Hi MasCaritas
I appreciate you pasting SteviB's answer from the Reddit AMA here. That was quite a while ago and nothing ever came of it. The voltage increase, if implemented, does not seem to have had any effect. I'm not holding my breath.
I sold my SP3 around this time last year for $950, with type cover and dock. At the time, that represented about $1500 in lost sales to MS, since they saw no profit from my resale. Since then, they missed another sale to me last summer when I was considering buying a SP4 as a personal machine and decided against it after trying the pen in their store.
Recently, I needed to get a new machine for work. After my experience with the SP4 in the MS store, I didn't even consider the SurfaceBook; I got a ThinkPad X1 Yoga for $1900. At this point, MS has missed out on about $4000 in Surface-line sales just due to me. I think they are severely underestimating how much this problem is holding back potential buyers.
For the record, I'm very happy with the Wacom AES tech in the X1 Yoga. I was afraid it would be more like Ntrig than like traditional Wacom EMR, but it has proved very nice so far. Wacom AES works on the same principles as Ntrig: a powered stylus over a capacitive screen. Microsoft: invest in improvements to your pen technology! You are on the right track, but this issue is killing us.