I use UNIX since introduction to Xenix in 1993, plenty of commercial UNIX flavours, started with GNU/Linux in 1995's Summer, lost count on the distributions tried since 1995, subscribed to Linux Journal since it went out of print, have a good Walnut Creek CD-ROM collection.

When I really want Linux on a box, I care to find a OEM that makes it possible, regardless if the distribution is specific to them, like on Raspberry PI's case.