The contention is "what comes after segwit?" On the Core side is "nothing" (i.e., just segwit)
lol
In fact, the Core has many things after segwit; some of which are already done (compact blocks), signature aggregation, weakblocks, flexcaps, etc.
All anyone else has is MOAR BLOCKSIZE REGARDLESS OF THE CONSEQUENCES and some heads on spikes.
in short core is not promising to copy the 2mb base within months of segwit.. thus expect big issues in regards to the 2mb event 3 months after segwit, due to lack of node support.
(expect major orphan drama)
hey gmax, how about re-implement a new fee priority formulae and stop this mindless 'just pay more' mantra