With a couple of months of full blocks the blockchain would be so big that only a handful of nodes would be able to run it. It will be a completely centralized coin. Pretty far from "Satoshi's vision" if you ask me.
I don't have a dog in the core vs bch/bsv fight although I do find what BSV is doing is interesting, whether it will succeed long-term who knows. But one thing I've always rejected is this idea that everyone should be running nodes. The only people who run coin nodes are nerds with an altruistic mindset run, there is virtually no incentive for the average person to contribute electricity and keep their computer on 24/7 or even worse, to dip into their own pocket to run a cloud server. Human beings are inherently selfish and the best way to entice someone to do something is pay them. This is the heart of capitalism. Miners get paid for the work they do, why shouldn't node operators, even if it is just a pittance in fees since the overhead is much cheaper? While cheap, it is still overhead though.
You know what is actually
true decentralization? Millions of people actually spending and USING Bitcoin around the world and the numbers being so gargantuan that the governments of the world can never hope to shut it down. People distort what decentralization really is IMO. The fight in my mind should always be to evangelize and spread Bitcoin/crypto's use, not have academic arguments over which network of 0s and 1s is more spread apart than the other.