Have used a lot of burned games at my first Dreamcast and the damn console still works fine I did even purchased a second one just to play my original ones but the true is that you can safely play without any fear, just burn the game at the lowest speed 1X and use the Padus DiscJuggler at least this is the one that always used
How long did you use that badboy for? After reading some forums online it's got me paranoid.
The truth is all spinning disc drives have an MTBF. (Mean time before failure). If you use it a lot (burned discs or original) the drive will eventually die. If you use it only a little. It should technically last longer but you'll get less enjoyment out of it.
Enjoy it while you have it. If it dies hit up ebay and get a replacement motor or console.
I still have all my original consoles and the drive are still going. That said I probably haven't pushed them as hard as most.
Some folks game non stop every day of the week (easy to do especially if you have a huge library of burned games). I think the failures people had that they attributed to burned discs were mostly speculation because they were probably playing a burned game when their drive died.