1) Yes, I know the habits of Windows. I know about the background
processes and the growing and fragmenting Registry. The Linux
community appears to have found a way around that.

Sidebar:
My interest in UNIX may predate my use of Windows. I couldn't afford
SCO XENIX thouigh. I still have MINIX (which Linus Torvalds developed
into Linux) on floppies. But subsequent tries to get Linux installed
on a computer of mine failed. I remember RedHat, Slackware, and a
failed installation of SuSE 6 with my Linux guru sitting beside me.
Moreover, even when Knoppix proved to run on a computer of mine from
a CD, Linux seemed to be looking away from (creating) multimedia.
Some four or five years ago I witnessed a (poor) demonstration of
the musical possibilities of Ubuntu Studio. Last year I made room on
that 32-bit system and installed it, and finally doubled that on this
64-bit system.

2) I may well eventually support Ubuntu Studio, by money rather than
time: when I consider myself a regular rather than a visitor or
newbie.

On your later reaction:

3) The app that convinced me of my "need" for a tablet was
GarageBand. (In the shop I managed to freeze the iPad running it...)
The great thing about iOS (matter of opinion!) is its implementation
of multimedia, especially MIDI. (Everybody and their aunties create
camera apps and musical instrument emulations.)
History seems to repeat itself (matter of opinion!): Android seems
to be looking away from (creating) multimedia.

4) Oh yes, I definitely prefer to spend my money on open source
projects than on profit margins. Unfortunately, the hardware is
likely to stem from similar exploitation.
I am involved in Dutch politics, but let's keep politics off-list. ;-)