Phil is so old that he's talking about bakelite 78 rpm discs.
Once the edges broke on them you could soak them in hot water and make flower pots and ash trays from them.
Vinyl records wont break, but they will warp. Anyone storing records upright in a groove is asking to have a completely useless collection after the first hot day of summer, or within 6 months if kept in a cold room.
Vinyl LP's should be stored vertical, between full sized edge walls, and under just enough pressure to keep them completely vertical.