I think there will be no more development as far as bitcoin goes, if you would remember there was so much talks about increasing the block size and redo the code for many years but it didn't materialised and that's why Bitcoin Cash is born, except for LN though but its off-chain. There's a lot of people here who found bitcoin and change their lives so I guess more and more people will discover it in the future that can make a lot of difference in them.