How to tell if shoes are dry rotted/will fall apart?

Long story short, getting into pickleball and brought out some old court shoes I had for tennis (8yrs old, lightly used).

I’ve heard stories about people’s shoes disintegrating and really would like to avoid that while playing.
I’ve put the shoes on and walked a bit with no issues, smacked the soles together to mimic shock, poked the soles hard and I haven’t see any damage.
Any other way I can check the condition of these shoes to check for dry rotting?

Thank you