TBH if your linkage isn’t tight you get wear…. which parts wears is the softest part.
If your bearings need replacing then the linkage loosens etc.
My T-130 has no issues…I’ve seen the shaft when doing a service. However I did buy another shock because I’m only 70kg and it was a ML3 tune (and t was £100 nearly new). The kids is still in default tune but its nice to know I have the spare as replacing his tiny 152mm one is like hens teeth. Ideally I’m thinking that I can swap them over and not be so rushed to get a full service… which is what I’m doing with mine at the moment… and when the next service is done send the other one and get it serviced and ML3 tune done at the same time.
The kids shock I’d planned on just the main part then randomly planet X were selling the aircan for £3…. so I’ve now got a brand new shock – he does have a small scratch but its holding pressure… if it never gets used I can sell it when he outgrows the bike or with the bike.