Thanks for your reply, but this indeed does not arise from real-life issues. Arguable snap itself does not help primarily the end users (which now can choose between snap and deb). It helps software vendors to distribute for linux
But of course there are issues, especially in cases like nix where it is not supposed to package gui apps, and you download gigabytes of data, mostly unrelated dependencies. Or with flatpak, where any application should be sandboxed, and when it’s an IDE type of application