A mod that could be a pretty good alternative to compact circuits. Schall has some mods that make scalable versions of items like machines, pipes, and circuits. What they do is you basically unlock through research smaller versions of each category type. So say you unlock the half size, you can fit smaller versions in a tighter space, like putting four combinators side by side in the same space a normal sized combinator would take, it basically makes these smaller versions use a subgrid based on the size you make em. This also has the advantage of making it all be on the same map rather than each compact circuit having it's own map. https://mods.factorio.com/mod/SchallCircuitScaling

Hello. The reason I had Compact Circuits on the recommended list was that the old circuit examples would grow in size as more items were added. Now that the circuit examples don’t need to expand, I’m actually considering removing it from the recommendation.

However, the mod you recommended is new to me and looks really interesting. I’ll try it out and consider adding it to the recommended list. Thank you! :D

My pleasure! Schall makes some pretty interesting and very useful mods so hopefully there's more that you might enjoy of theirs. :)