Abrupt fee raise, and suddenly worthless?
Value isn't the same as usability, gold is valuable but you don't see people sending gold via pigeons to Amazon.
A lot depends on what you think Bitcoin was supposed to fix, and Bitcoin making 100x gains might not be the only thing some thought it's a good idea, maybe some thought of it as an alternative to other things. When the continuous growth will flatten what will be the attractivity if not cheaper borderless uncensored usage?
If you broadcast an 8 MB sized block at the moment you'll have it rejected, because anything beyond 4 MB is invalid. Validating previous invalid rules requires a hard fork. A hard fork means to break backwards compatibility. (unless you find a way to do this with soft fork; in that case, I'm all ears)
Nodes only have to validate blocks on the rules since the moment of the change, since there is no running chain with more work that has invalid blocks by the previous rules that become valid right now where would the problem be? Reducing the size would trigger incompatibility, all the previously mined blocks would still be valid under an 8 or 16 MB rule.
If hundreds of pages of academic research, thousands of hours dedicated to discussions, envisioning, and coding of second layer solutions, and the numerous forks of cryptocurrencies such as Bitcoin and Litecoin that failed to make progress by simply increasing the block size limit arbitrarily – if all of these do not provide evidence that global adoption cannot be achieved by tinkering with the block size, then I am at a loss for words.
Hundreds of academic research mean nothing when you have to put food on the table, just as nobody gives a crap about the world ending in a climate catastrophe when the only way to go to work is by driving a wheeled furnace, or whatever the name of vw models is right now! Few care about academic research when they have to pay 100sat/b or wait for one month till the fees go down!
I don't know how the hell you arrived at the conclusion that just because Litecoin offers more transaction capacity and hasn't been able to go global automatically means Bitcoin shouldn't do that if it wants to go global! Let's do the opposite then, put a limit of 1kb and a block every month, that should lead to universal adoption!
But ok, I can't wait for 2040 when I have a 512 terrabyte smartphone, I can live stream in 1024 over 100Tbs but the blocks will still be the same cause 1MB of
memory block size will be enough for anybody!