Other blockchains have continued moving on
Sure. But they're relegated to the realm of highly sketchy pre-mining schemes and pump-and-dump market gambits. There's no serious third party mining community for these boutique coins.
I expect its obsolescence will catch up with it and overcome that inertia.
We still have people digging yellow rocks out of the ground and shoving them in big vaults to store fiscal value.
If that's not obsolete, I'm not holding my breath on Bitcoin.