Oh I was fully aware of that, but nevertheless I do not consider it a wise decision to abandon the wallet development:

I would say the probability is 100% that a non-zero percentage of users will not be able to figure out how to migrate to a different software and thus lose their money.

Also, as said elsewhere, for the billion dollars they got handed they could at least provide the most basic set of software. If you're a cryptocurrency project that would be a wallet.