I made my first melamine enclosures with plastic glass tracks in the 90s, and the last of them went on to a bonfire in the mid 2010s, melamine worse for wear, but with the tracks still attached (yeah, I guess I burned some plastic). Some of the others didn't last as long, but it wasn't the tracks which failed. I think a couple of the smaller ones I made are actually still in use (I sold them around 8-10 years ago). For various reasons I found the smaller enclosures tended to last longer, and after around 15-20 years they were still in great condition, but these days I wouldn't use any small wooden enclosures (I'd use tubs), and I'll likely never use melamine for anything again.