Do older figures begin to feel loose or do bigger figures have stiff/sturdier joints?

My collection of Transformers are small but I very infrequently get new figures. Energon Galvatron was obtained at the tail end of Legacy’s run in late 2024, SS86 Ratchet was a secondhand hobby shop pickup in early/mid 2025, & I just got Razorclaw yesterday. Picking him up got me a little worried with how old my other two figures are & concerned about how they feel to transform compared to the day I obtained them.

Is it normal for an older figure to feel lighter when you fiddle around with it? I’ve left the other two on a shelf or dresser for so long that I feel that dust getting to them have started to affect their joints & make me feel worry about transforming them to their alt modes. Ratchet is a worse case since I’ve never been able to properly convert him to vehicle mode since day one & I worry that will be impossible with age. Of course, I might be paranoid & probably just now found out that bigger toys probably have stiffer joints to keep them together while smaller ones always felt light. But I’m asking for input from everyone here just to make sure.