One aspect is that the server side is not free software. So only Canonical can reasonably host a repo of snaps. That was enough for me not to look into the tec

One aspect is that the server side is not free software. So only Canonical can reasonably host a repo of snaps. That was enough for me not to look into the technical merits of the clientside implementation. The few experiences I had with snap was that programs were starting slowly (Firefox) and e.g. GPU acceleration did not work (vlc). Not sure how good the sandboxing is. But I run my Firefox sandboxed by firejail and the overhead can not be felt in daily usage.