Is there a good chance of recategorization pushing a very marginal business off the cliff? Sure--that Twitter thread, where there are enough details to read in, has a lot of examples of marginal businesses having trouble (mostly because of not being able to plan in the change, which really sucks). But you don't have that on day zero, and going in with the aim to be that very marginal business is probably not the best of ideas. It's not a day-zero problem, and I am struggling to see where a small business with a business plan that was previously worth executing on is now not worth it because of this change.