This is where a recent video by [CNC Kitchen] is rather illustrative, using a collection of colored PLA filaments from a single filament manufacturer. [CNC Kitchen] ran a range of tests including ...

[Stefan] from CNC Kitchen explored an unusual approach to a multi-material print by making custom PLA filament with a TPU core to make it super-tough. TPU is a flexible filament whereas PLA is ...

You might already know about PLA and its ease of use, but sometimes, you need a stronger material that can handle heat better. Other filaments can do that without taking away from your print quality.