This is the same as saying that micro SD are crap because you can't use them in SD slots.
i.e. it does not make sense (or I am missing something on the micro-sim concept).

The only issue could be when you would want to use an other sim in the phone. Then you would have to cut it, which is not always practical if it's not yours.

I'll just cut the two sims I use, buy two adapters, and be done with it.