After a Labs' "Dissolve Flat Edges" I ended up with this shape. But I still need the edge loops (1-3 and 0-4).
What's the smart / fast way to connect those?

PS: I've already solved the problem with a different approach -> Add (keep only points) > Fuse > Add (PolyByGroup) > Extrude > Peak > Extrude, but would be nice to know a better way.
Thanks!

In this particular case you could probably just use a Divide SOP with the 'Maximum Edges' parameter set to 4.

Another approach would be to 'Dissolve SOP' the 'end' edges - enabling 'Create curves when dissolving boundary' - leaving you with two open curves. Following this you could:

Add a 'Polybridge' SOP to bridge them back together. Use 'Implicit Pairing' set to 'Use Edge Counts' on the Pairing tab.

Or add a 'Reverse' SOP - set to primitive group "0" - to reverse the direction of one curve, followed by a 'Skin' SOP.