Since segwit2x is compatible to BIP148 now and will activate Segwit after August 1st, there is now no excuse anymore to not merge BIP148 into bitcoin core.
Or am I wrong? There is also wide support for BIP148 from the core developers: https://en.bitcoin.it/wiki/Segwit_support
Why everyone should still run BIP148:
If Segwit2x is 148-compliant and you are running a 148-fullnode: nothing goes wrong on August 1. If Segwit2x is NOT 148-compliant (too slow to reach 80% signal rate) and you are NOT running a 148-fullnode: you might be on the end of a chainsplit that eventually gets reorganized into oblivion.
UASF FTW!!! Lets get segwit activated! 🙂
See here for more information about BIP148: www.uasf.co