I'm 6'0 34/32 and even still feel some of this; L shirts are baggy, but M shirts (and sweaters) are often too short in the length and arms, especially after a wash.

And it's not my imagination; I have a few custom made dress shirts from Maxwell's and those absolutely do feel correct in both dimensions.

A tall medium where available will typically work for me but most brands don't have it at all and those that do it's a special order so what's even the point of being in the store; I might add well have just done a blind buy online from home.