It doesn't matter - Intel will simply fix this exploit leaving you back where you started and in the end you would still be supporting them monetary to make bigger and better methods of anti-feature technology...there also isn't any way to be sure that the hypothetical ME uber-rootkit isn't simply placating you (ie: a faux shell) and is still spying on you without you noticing.
The future is not x86-64, think 10 years ago when everyone said there would never be any games for linux - now there are many native non-emulated AAA games available.
I believe some day soon we will see a POWER laptop, even 5 years ago people would say that something like TALOS 2 couldn't be done and look where we are now! (Let us hope those with the funds and need for that level of performance will get one instead of an x86-64 system) If enough people have POWER systems the market will emerge for a mobile workstation to support development operations.