.. I’ll keep working on my flexibility doing things that include stretching movements because it helps with my range of motion and general mobility. ..
Duffy, me too, I agree with everything you said regarding stretching.
I used to do taekwondo which as you know is an acrobatic high kicking sport, I went on a stretching regimen (plus I used to it in in class too) and this greatly increased my hip flexibility. Attempting high kicks with limited hip mobility would have been asking for groin injuries.
I don't do that sport any more, but I have kept up on the hip mobility exercises because I think it can stop injury in other sports. For example I have had my front foot slip off the deck of my surfboard which put me in the semi splits position and I have got away without pulling anything. I have also had my back foot slip off the tail kick when trying a nollie on my skateboard and got away without injury - this is partly because I do everything at snails pace on a skateboard and surf at a really tame level, so I am not saying it makes me invincible.
I stretch calves and hip flexor after every surf on the beach (one stretch I know does both). I also stretch hamstring and adductor after every session on the beach (again one stretch I know does both -actually it does one of the calf muscles too). When I get home at some point in the day I will stretch ITB (because a physio has diagnosed I am prone to getting that tight due to flat feet) and hip flexor with one stretch lying on my side. Apart from some lower back stretches (and another adductuor stretch) that's all I do. I have settled on a set of stretches which do more than one muscle at a time because I don't want to spend all my life stretching!
What I have noticed is that immediately after a surf my calves are quite tight - maybe because lying prone on the board the feet are pointed. However sometimes like this morning I finish off my session by exchanging my surfboard with my skimboard which involves a lot of short brisk runs to jump on it. After skimming my calves are quite easy to stretch because they are warmed up from all the sand running - this is the best time to try and work on increasing the length of my calf muscle. Touch wood, it has been many years since I pulled a calf muscle.