maybe those coins have issues with nodes and community but their technology like BCH has a 8mb block size or BSV which i think has a 32MB block size which means higher scalability and way lower fees but maybe even that is not enough for real use while BTC has a 1mb blocksize and Segwit2X has 2mb.
This is not a new technology, this is just a design choice. BCH just changed a few parameters, they created zero innovation.
Larger blocks will hurt decentralization. Nowadays it is not very costly to run a full node.
Take a look at Ethereum blockchain, as a comparison. An ethereum full node needs to
sync 6.45 TB of space. Because of that,
more than 60% of Ethereum nodes run on clouds like AWS servers. This mean the network is not as decentralized as it could be.
As noted by a comment here, SSD and HDD hard drives aren't that expensive nowadays, and what stops the bitcoin team creating full node rewards like in Dash