My granddaughter uses elementary education applications. I use many
applications in adult and (until recently) employment mathematics, science, and
technology. We both use some applications infrequently. We sometimes wish to
return to the application after weeks without using it. Linux and Ubuntu
applications have very few "box canyon" features (easy to get into, useless to
us, and hard to get out of). Therefore, we don't spend so much time learning
and relearning to avoid (and escape) box canyons—seemingly the major part of
learning applications for the other two operating systems I've used.

Ubuntu applications do what I want with no nonsense. Apparently, the people
writing Ubuntu applications write use them in the same way I do.

Installing new programs on the other operating system I've most frequently used
changed functionality of previously-installed programs. Since I use many
programs, installation interactions got to be a major headache under Windows.
Given the written introductions to Linux packages, I expected horrible mess with
new installations. (They change dependencies other packages use?!!!) But
Ubuntu has never produced any such problems here.

So Ubuntu takes me where I want to go more directly.