Earlier quoted context omitted.
Why does it have to be sad? To me it is good news! Especially if it is open source. The more software we can write that isn’t specific to a platform the more free and useful software can become. It wrestles back control from google, apple, microsoft et. al and makes their closed platforms less relevant.
"Useful" as long as you don't care about battery life, memory usage, taking advantage of features of the host platform, or the native UI. As an end user why do I care about "openness"? If I pay a premium for my platform, why would I want second rate cross platform software?
Are you paying for your software or getting whatever you can find for free? If you are paying, is the software's leanness something you value - that is, will you buy some software because it is leaner over some other software that is heavier? Would that be even if the heavier software has more features?
What sort of software have you bought? I'm asking seriously, not trolling - i've bought Total Commander myself exactly because it was lean (check: windows calculator vs one of the most feature packed file managers[0]) but i do not think there are many that value things like that.