What excactly dont you like about FF?
The ability to add addons (on nightly, you can even add any Desktop add-on you like), tab containers / cookie jars, or the flawless syncing to desktop, including passwords and bookmarks?
If that is your mindset, you're definitely better without root. My phone is rooted for three years now and never had any issue. I never had an app fail with my methods to hide Magisk. I even got GPay and contactless payment working when I still had Google services installed. Without them, it is impossible unfortunately.
I know I'll miss the alert slider from my current OnePlus phone, when I have to replace it in the future. On the other hand, I miss the fingerprint reader in the power button. Its just more reliable.
CPU architecture wise, you can see the difference between cluttered, old x86 and ARM or even RISC-V chips. They just run so much more efficient, as you can tell with your phone lasting a day or two, or apple silicon consuming a fraction for the same performance.
An example for the ancient backend would be the flight pathing system DAL. (Wendover video)
You're only partly right.
You example services. Of course it is not possible to own services.
Piracy is only applicable to products.
The point of the Twitter guy is, that companies intentionally stop selling their software etc. as products to sell you the same thing as a service, so that you cannot own it.
What excactly dont you like about FF? The ability to add addons (on nightly, you can even add any Desktop add-on you like), tab containers / cookie jars, or the flawless syncing to desktop, including passwords and bookmarks?