There are physical limitations on the aperture side. It's physics. The optical resolution of the radar resolution you can get diminishes with size of the aperture that you have, so you certainly can't get submeter or multi-centimetre resolution. You can't pick up signals information. There's a limitation. Of course, one way is to simply have a lot of them. You can overwhelm defences, whatever those defence systems are, much like we see in the use of drones in Ukraine and Russia at the moment.
There is a physical limitation to the aperture size that you can put on a small platform. It has a limitation, but you can then use those for detecting 80% of what you want to detect and use the very large-aperture, larger satellites, such as RADARSAT, to detect much, much smaller devices.