My text is crusty and blurry after switching to Linear color space and URP: I saw a few guides how to fix this (specifically port existing - not create new), but they seem a bit dated (or I followed the guide wrong, resulting in pink text).
Is there an “official” link to how to port?
Linear vs Gamma space will render text differently but that should not be dramatic.
Most of the TMP Shaders will work fine with SRP (URP and HDRP) with the exception of the surface shaders which are not compatible with SRP. See the following post / thread which includes new shaders Unlit & Lit for SRP and accompanying video.
One of the common issue that users can run into when switching to SRP (URP / HDRP) is FXAA being automatically set on the camera. This will lead to text object being fuzzy since that is what FXAA does which is find for objects but horrible for text.
Pink text means either missing shader or an error in the shader code. The surface shaders with SRP would show pink.