My understanding of Bitcoin Cash and Bitcoin SV is that they have just increased the blocksize the clients can handle. Is there something more to them than that?
Not really, but the result is essentially no fees. And thanks to Moore’s Law there’s no trade-off for it. Bitcoin (Core) is insane for having high fees.
Yes. It's really worth dwelling on the long-term implications of terabyte+ sized blocks and fees of a thousand of a cent. This is where BSV is heading and everything changes at that scale. New use cases are unlocked. Old architectures need to be rethought. It's the most interesting technology I've encountered in a long time and it's a gem of entrepreneurship opportunity for those that can stomach swimming upstream.
there's also sidechains, segwit, and lightning network which shrink and consolidate transactions to increase the number of them that can fit in a block