Well they are. Segwit bech32 gives bitcoin 2.2 scaling which is not much. It would give bitcoin 7 tps. Batching(like it or not most bitcoins sent are from exchanges)combines many payment into 1 lowering the transaction stress. LN is bitcoin ultimate goal. Which is being, worked on along with sidechain such as rsk and liquid. Don't get me wrong i don't mind bitcoin cash and the bigger block theory. What i believe is that their is a limit to big blocks. I and many others would like max 10mb blocks. What I do have about bitcoin cash is that their marketing. Ok fine call bitcoin bitcoin core(which isn't true bitcoin cash forked off but fine 😠) bc after all they say bitcoin split in two. Bitcoin cash and Bitcoin Core(which is false by the way but fine 😐). But please don't promote bitcoin cash as Bitcoin(BCH). That is not ok.
And also many altcoins would be stressed out like bitcoin is. Steem and bitshares are one of the few that can handle TXs. But it has increasing supply, and is not bitcoin. And also bitcoin is innovating.. Just testing the tech out and/or not being added quick enough.