I mean, he's doing alright by my standards. I gave it a solid try but couldn't keep myself awake through it no matter how I tried. Beautiful prose - pick a single random page out of that book and you can get a message in it's own microcosm. Trying to synthesize it all made my head want to explode and my brain chose sleep instead of computation.
I see. You might be pushing it harder than I typically do. I use it to setup new installs and get all my pluguns transfered and for keeping bookmarks and history synced and it works well for this. I'm not typically doing a lot of hot syncing looking for tabs to update rapidly etc. Be sure to give them feedback and upvote similar complaints on their blog.
Ignore the fanbois here. Vivaldi is solid. I will ditch it like an old sock if they end up having to adopt the new standards Google is pushing though. I'm confident Vivaldi will fight doing so until bitter end. I hope they are even willing to switch engines if needbe.
Speed is not important? Are you sure? Is this your first printer? I though that too at first, but trust me, you are most likely going to want speed more and more once you get going. Also, 3D printing is pretty much synonymous with tinkering unless you have some sort of business model in mind, but if you do... (see comments about speed).
My take, go with lightly used mk3. Market is primed for two reasons - first, in US at least there is just less of a sellers market lately for anything used and with recent Mk4 release people are looking to sell to upgrade.
Wish you luck with whatever you end up with and have fun and don't be afraid to tinker!
Who is they and how does this work? Sounds interesting.