Microsoft Surface 4 as Laptop Replacement for Soaring Pilots?

I've had a Surface Pro 4 for work for a couple of months and in general it
is a fantastic device. I would agree about battery life, it's not an
all-day machine unless you are very careful. I have had some problems with
sleeping and hibernation but overall I'm happy.

It's pretty pricey though; I think if I were looking at something to take
to the airfield, I'd consider a Surface 3 although it has a bit less oomph.
Longer battery life, no fan to clog with mud, full Windows, quite a bit
cheaper.

All the Surface tablets have MicroSD slots, which is handy for some
loggers.

I always have a tablet for specific work stuff.
Seen a few Surface computers, thought them a bit flimsy for work in the field. Been quite happy with a Motion Computing R12. Much better than other Motion tablets owned: M1200 and LE1600. The vintage 2002 M1200 is still alive, but that's about it.
But the R12 is not glider pilot friendly, as it actually costs money. This one was $2600 without a 4G modem. They're built for rugged field work. Sunlight visibility is good.
I disable the touch screen so it doesn't do anything odd while climbing around and holding it. It's been dropped, rained on and laughs about it. The pen works great. Personally wouldn't want to type on anything without a real keyboard though.
Jim