Hmmm, anyone else have a weird sense of deja vu ?
I can recall - on these very forums - the end of the world being catastrophied over when IR35 was first bought in under nu Lab in 2000.
I will just note that we are all still here, UK IT did not collapse, and none of the mouthy gits I was working with at the time followed up with their talk of "leaving the UK". Suggesting that emigrating is easier to say and spell than do, and that the grass isn't always greener.