How sure are you that the Google software and hardware you're recommending won't be enshittified at some point, especially in light of Google's behaviour in recent years?

Because one of the core guidelines in this new setup of mine was exactly to avoid software/hardware stacks from profit-driven companies were the temptation to "make it nice now, enshittify for maximum $$$ once there's a good installed base" is very much present, hence I went all the way to a fully open source solution with an as generic as possible mini-PC (the fully generic PC, a self-made desktop, would not have looked as good in my living room and use way more power, whilst the mini-PC looks like it belongs there and has a 15W TDP).

I mean, my first try at changing my home media setup was actually getting an Android Media Box (which is much cheaper than a mini-PC), but the mini-PC plus Linux gives me total control over the entire software stack and a lot more than an Android Media Box does over the hardware stack (I can actually add more storage, expand the memory and even change the wireless support) without having to jump through the hoops of rooting an Android to get rid of all the crap (and not just he crap from Google - for example I didn't want Netflix on the fancy starting menu of the Android box and yet if I uninstalled it, the pretty picture for it would still be there using space whilst not actually working) which is not exactly non-techie friendly and might not even be possible (I do believe it is possible for the Chromecast, though).

Android is an inferior solution if you want to avoid enshittification and are not all that technically proeficient, though if you don't care about being forced by the software on your own hardware into shit you don't want (such as watching ads) it is the technically simplest option, but then again that scenario is just enduring the kind of abuse that the post is talking about, and my advice is not at all for people who are fine with ads and other "product promotions" (such as pre-installed software supporting services you have to pay for) shoved in front of them even in their own home and their own hardware.

Whilst I didn't go for the fully integrated Linux+Kodu solution which is LibreElec and instead went for a self-made Lubuntu + Kodi solution because I have lots of experience with Linux and wanted to do more with that device than just "media box", my expectation is that a single-purpose packaged solution like LibreElec on top of a mini-PC together with the kind of remote I mentioned above is the simplest "just works" option: so accessible to non-techies and without enshittification or a risk of future enshittification.