There was an Ubuntu developer that left Canonical about a year or so ago. His reason was that he had spent a number of years (possibly over a decade, can't remember) optimizing some code and the kernel to get the fastest boot time possible.

Then he saw Canonical practically throw his work out the window by introducing snaps, which until recently was plagued by serious slowness on the first start of a snap.

He said it felt like his years of work just meant nothing at that point.

There are a number of reasons Flatpaks are a better open source option, even if they aren't perfect.