Like all things with Apple, macOS will evolve, likely to key around having A.I. features "ON" to use desirable "new features we think you will love" and thus accelerate the pace to leave old hardware- including 8GB RAM devices- behind. We can see this by the former dominant tech catchphrase- the cloud- getting so deeply integrated into Apple tech, it's somewhat challenging to avoid having to pay the monthly rent for more cloud.
So while 8GB will still function, you'll feel like you are missing out because macOS will go where your 8GB can't really follow. Look at people with loaded Intel Macs with plenty of power for current A.I. finding that there is no support at all... to press them to go Silicon if they want these features. That's the AAPL way: turn over hardware purchases as fast as reasonably possible. It's one of several strategies that have made them generally competing for richest company in the world.
Yes, there very well may be OCLP-type hacks to show that old hardware can learn new "A.I." tricks exactly as such hacks now make it possible to upgrade old Macs to versions of macOS beyond some arbitrarily-chosen cutoff by Apple. But 8GB RAM was ACTUALLY probably too little for macOS a few years ago. The cheerleaders just argued that it was plenty to anyone who would listen as the cheerleaders always argue that whatever Apple chooses is best "for 99% of users" until Apple changes. Note how many of those voices are NOT now ripping into Apple for forcing "too much RAM" into all new Macs. Now that Apple has embraced a new base spec, it's as if passionate defenses of 8GB even throughout 2024 were never written.
Morale of the story: when asking questions of a very biased crowd to influence purchasing decisions, consider the input if you dare but also remember the older mantra: "think different" which- when it was slung by Apple themselves in the past- didn't seem to mean *as long as it aligns with what we want to sell you right now.
Minimal specs in an un-upgradable computer is just begging for technological evolution to obsolete the device sooner than buyer may hope. If you want long life out of such devices, you need to buy for 5+ years from now vs. buying for right now. The twists & turns of tech may obsolete a purchase sooner than expected. Else, be prepared to do exactly what the Corp wants you to do: buy again and again and again ASAP.