Not sure if this has been mentioned or requested.

As we know there are some differences between the plugins, addon, themes etc between 4.0.13 and 4.1+

Can we please have some indication in the marketplace that shows each compatibility. At the moment we are relying on the devs making sepcific mention.
Also being able to filter all 4.1+ compatible products would save some time and any potential issues. I can see people buying IPS 4 stuff with the assumption it will work for 4.1+.

We're working on this.