[mrheosuper]

from the PM perspective, it makes little sense to transform from 2 to 3.

Those devs had spent weeks/months for this app, now they want to throw it all away ?, that means throwing money through windows. Also, the risk that the new app may not work like before, or missing deadline, etc. A safe bet would be reiterating (2)

[bonki]

I explained in another comment why it isn't throwing money out of the window. In my experience, it often costs a lot more money in the long run to not do it. The underlying problem is that most companies don't really think mid- or long-term and are happy with chasing fast money and eventually throwing it all away anyway because the product isn't competitive anymore and/or maintenance becomes too expensive. These are problems which definitely can be mitigated, but it requires a good team.