What technical development are you speaking of? I thought the Bitcoin community didn't want any modifications to Bitcoin.
- Schnorr Signatures https://github.com/sipa/bips/blob/bip-schnorr/bip-schnorr.me...
- Taproot https://github.com/sipa/bips/blob/bip-schnorr/bip-taproot.me...
- Erlay (relay protocol that reduces bandwidth up to 75%) https://arxiv.org/abs/1905.10518
- Dandelion (privacy enhancing transaction relay protocol) https://github.com/bitcoin/bitcoin/pull/13947
- Miniscript https://prezi.com/view/KH7AXjnse7glXNoqCxPH/
and many more
I think the UX is still far from great, but it’s slowly getting there.