I find it odd that people are trying to blame Nintendo for this when there really is no one to blame. AlphaDream was probably hurting long before Bowser's Inside Story remake and them putting it on the 3DS probably came down to cost. As a financially struggling company would not simply be able to take on the risk of a Switch title as that would mean a brand new engine, assets, larger staff, more salaries, and longer development cycles.

Nintendo may had even asked at the start of development if they wanted to do a Switch or 3DS game and probably came to the decision with AlphaDream that the 3DS would be the least costly and may help them get a larger profit. It could be they may had not wanted to do a Switch game in fear of going bankrupt in mid-development. However with shifting markets it did not turn out that way. It's the nature of the industry that good studios will go bankrupt due to no fault of any party and it came down to just bad luck. Wrong game at the wrong time despite the quality of that title.

Now bankruptcy may not be the end for AlphaDream. As an example even Marvel Comics went bankrupt at one point. They are right now trying to find someone to help take on the debt and Nintendo may help them or they may not. It's now just a waiting game.