The lack of soft forks is due to a lack of interest— not a lack of process

Bitcoin Core developers will dedicate their time and energy to whatever part of the codebase they find most interesting or important to work on. So far, that hasn’t really been any of the soft fork proposals. source: https://bitcoinmagazine.com/takes/the-lack-of-soft-forks-is-due-to-a-lack-of-interest-not-a-lack-of-process