If you use the same keyboard for years then PBT keycaps might be a better than ABS keycaps since they will last for the life of the keyboard.
ABS vs PBT Keycaps: Things you Should Know
What are doubleshot keycaps? Are they really worth it? - Glorious Gaming
ABS vs PBT: What It Takes to Make the Perfect Keycap
ABS Vs PBT Keycap: What are the differences and which one is better for you? - Hirosart
ABS Vs PBT Keycap: What are the differences and which one is better for you? - Hirosart
PBT Keycaps vs. ABS Keycaps - Das Keyboard Mechanical Keyboard Blog
What are keycaps? An Inside Look At Keycaps - Hirosart
Das Keyboard 4 Professional for Mac Custom Mod with Gateron Black Ink V2 and NicePBT Sweater Weather Keycaps, Lubed and Filmed, Foam Mods
Backlit Side Print Keycap Set, Shine Through 136 Key PBT Double-shot, Cherry Mx Mechanical Keyboard, OEM Profile, Gamer Keycap
PBT vs ABS: Keycaps Explained - Overclockers UK
ABS vs PBT Keycaps
Warehouse Clearance - Das Keyboard Modern Font English RGB Keycap Set - Das Keyboard