You specifically said the fix might be to permanently disable HT.
The TSX situation was indeed unfortunate, I have one of the affected CPUs. But it was a new feature that was broken, not something that used to work, so the bug's impact was less serious, and disabling the feature didn't have too much of an impact.
The Dell XPS 9350 (Skylake) has numerous issues with GPU noise, USB-C compatibility, wifi reliability - Dell don't care unless your consumer laws are strong enough to make them care.
TBH, everything was covered by warranty other than the coil whine and wifi - by sticking to one particular driver version you can avoid many of the wifi issues. Not everyone has had the USB-C problems and it's gotten a little better with the most recent updates.
