Just signed the open letter drafted by FSFE.
The URL might give the impression this is about mobile phones and/or other devices running Android.
But the phrasing keeps it general and it also would apply to any iDevice or notebook locked down to run Microsoft software.
If I buy something I do not want to be threatened that I'd loose hardware warranty if I change the software running on it and I do not want to be forced to hack it to be able to do so and I do not want to be offered a one-way with no option to return to the factory defaults.
I hope this will be a major step or the one and only needed towards this goal.
Thanks PocketVJ @firstname.lastname@example.org for sharing the information!