Game stability has exponentially gotten better.
I started playing two weeks into Season 1. And we have came a long way since then. During that time, servers would go down like crazy. If I remember right, the servers even went down for almost a week. While there will always be disconnects, it is superbly better than it once was. Just wanted to take a moment to appreciate Riot and their efforts to make the game more stable. (report because in wrong board section.)