> The devs in charge of Bitcoin have purposely abandoned the idea of it being a currency. On-chain transactions are artificially limited to about four per second, and they refuse to change that. They call it a "store of value" now.

I don't think they abandoned the idea of it being a currency, I think they just have different ideas about how exactly to go about scaling it. The block size limit (and therefore the transactions per second limit) was raised 2x rather than significantly more because they don't think scaling onchain is a viable long term solution [0].

Lightning, and other second layer networks have always been discussed as the solution to this scaling problem, and while they are still very early, there's already a fair amount of usage. I work at a company that accepts Bitcoin, and as of today, > 90% of our transaction volume is via lightning.

[0] https://en.bitcoin.it/wiki/Block_size_limit_controversy#Argu...