Well There are 2 cases to be considered:
SegWit - They are proposing to increase the Bitcoin block from 1 MB to 2MB.
I don't think, this is the solution because in future they may ask for even more block size.BTC unlimited - They are proposing the block size to unlimited size.
I don't think it is a permanent solution either. Because, Blockchain will be huge in size then.
RE: Hey Bitcoin, where did all the transaction go?