There are pros and cons to both. Sometimes you should rent, others buy. If you use it every day then buying is often best. If you need it once a decade then rent.
There always have been some around. Not all diy stores have one but there is always one near from what I've seen. People keep discovering them and thinking they are new.
I'm not sure if I could get anywhere and back. Woge I own a gun and you have allowed me to get it on a plane, but that day would expire before I get home and now I have a gun that I am taking through airports and customs.
We need ways to counter them. If nobody counters when they warn about whatever made up junk they have someone else will believe them. I don't know how to country them though - it is harder than you might think. There have been a couple real conspiracies in history and if they accuse you of being in one how do you prove you are not?
A whole house ro filter is evpensive, so I doubt most will install one vs a drinking water system. Most plumbers won't know about a whole house system much less sell one.
unless you live in an area where the water is so bad your showers dosen't get you clean. Then you can get one - but you should have one.
We stopped using lead in the 80s - the existing pipes are mostly still there and working just fine. If you are in a building or city built before 1985 assume there is lead in the plumbing someplace and take action. The more important thing you can do is let drinking water run for a minute before drinking (or install a RO drinking water system that will remove lead - regular filters will not - RO is most common of that that will).
With a little care (much of it chemistry - meaning your water department - not much lead will leach from your pipes and you are okay. Okay should not be confused with good, 0 lead is what you want. However it isn't feasible to replace all pipes in a day and so step one is doing as little damage as possible, then we reduce even that.
They don't have to be dug up. The first step is chemistry - Flint was fine with lead pipes until they switch water sources to something with a different composition (ph I think - but there are other factors and we should get expert chemists to speak here not laypeople like us). Anywhere that lead pipes exist we need monitoring to ensure that the water doesn't dissolve lead, once we have that in place the pipes don't leach much lead and we can do a slower replacement when the pipes need to be replaced anyway.
We also have technology to put a plastic liner in existing pipes for much less than digging the pipes up. It doesn't work for all situations, but when it does is a lot cheaper and should be investigated for any pipe that is expected to last a long time.
There might be, but the doctor is prescribing the new one and the old is not substituteable. there may or may not be other differences between the old and new that matter (I don't know about this case, but in some there are and some there are not) Doctors never prescribe A or B - it is always A and if you want B that needs a new prescription. The doctor needs to know what you have as if there is an allergy or other problem they need to deal with it (if you always get B it may be A doesn't work for you and we don't know as you never tried. Or it may be that either would work but you go through withdrawal if you switch)
I have needed a new phone every 2 for the last 6 years because my old one physically broke. Battery might be good, but the screen is cracked: new phone. My last phone quit recognizing the SIM, and so new phone it is. In theory I can buy the parts to repair the phone, but in practice either the parts are obsolete and not stocked, or I can get them special order from China if I'm willing to wait weeks and pay half the price of a new phone. Then hope I actually manage to get the phone together again.
I live in the US where we use many weird by world standards frequencies. I've looked into various repairable phones, (fair phone, pine phone), but I quickly realize I often travel in parts of the US where they won't work. Thus I'm stuck with what my carrier offers. (Apple might be more repairable, but apparently more locked down)
Roads are a lot more flexible though. Tractors also use roads for example. As to bicycles and pedestrians.
Note that the above is about very rural areas where seeing 4 of the above per hour on any stretch is busy. As you start scaling up density it makes sense to separate uses, and trains quickly become the best option for various reasons.
The US (and other European partners) is sending BOTH ATACMS for missile launch sites, and also PATRIOT for targeting incoming missiles. Two different systems for a different purpose and Ukraine is getting both.
I wish I knew. So far I haven't seen one that works. It is despirataly needed.