Litecoin does have some development. People are just not as interested to look things up.
- LTC's global hashrate is at an all time high https://twitter.com/SatoshiLite/status/1521573077393416192
- MWEB went live a few days ago, making litecoin a privacy coin. This means when you transact with someone, they don't have access to your whole buy/sell history https://twitter.com/LTCFoundation/status/1521366615715049472
- Their website has been redesigned https://twitter.com/robertfcoleman/status/1521610435253862401
- LTC halving is happening in August of next year

Also, in my recent experience, litecoin hasn't dipped as hard as some of the other cryptos. So it provided a good opportunity for me to buy into cryptos that dipped hard (like ATOM). It's also one of the few old cryptos that stayed at the top 50.

While I agree LTC's development doesn't move as fast as other layer 1 cryptos, it wasn't meant to be an ever-changing smart-contract layer one solution. It was just meant to be a "bitcoin cash" alternative. Everywhere I go that accepts bitcoin also accepts LTC and it's arguably better suited for payments due to fast transaction time and low fees.
I expect LTC to make some interesting price action at the time of halving.