Is there any device you regret buying, and any device you like but you don't use because it's covered by others you bought?

I don't regret but I wonder if I should've bought the RG40XXV considering I had a RG35XX+ already, a V10 for GBA and the PSVita for PSP.

On the same time I love the RG35XX+ but I only use it if I go outside while carrying a bag, as at home I use the RG40XXV and the V10, and outside with no bag a MiYoo A30.