Indeed, the problem so far is the high transaction costs as you say,
and I hope the transaction fee can go down soon and I think that's what everyone hopes,
but if in fact the transaction costs are still high I don't think people will be that easy to leave ethereum
Old problem. They used to say it about Bitcoin too and even many miners and companies left to socalled better coin like Bitcoin Cash. then when Segwit came around people who were complaining took so long to adopt it until today it's still barely 50% adopted anyway. So maybe in the end tx cost isn't everything?