This older article claims Sram is not abandoning all its IGHs and is developing a new series for e-bikes.
Lets see, I have an in-law’s 40+ year old, SA 3-speed/coaster brake Schwinn Collegiate in the garage. It gets ridden occasionally to the end of the street to pick up the mail. Only two speeds work but they work well.

A few years ago I bought a nearly new Downtube folder with a SA 8-speed. It was the older SA X-RF8 version with a narrower gear range than the current X-RF8(W) offering. With the OME 53 tooth single chain ring it had a pretty ridiculous 40-121 inch range. I changed to a Patterson 28/45 internal crank set which made it a nearly ideal for me 21-102 range. The SA hub was very fussy to keep it indexed. When the rear rim started to head south, I decided not to lace the new rim to SA hub and opted for a Nexus 8 IGH.

There is no real comparison. The Nexus is saddle and steering tube above the SA in quality and performance. The stock Patterson/Nexus with the 17 tooth cog (the smallest) gave the system a 16-80 inch range, which is a pretty low range, but come to find out Sam Patterson has a 32 and 36 chain rings options to replace the original 28. The 32 would give this old man something like a 19-90 range which should work. I suppose what I’m saying is changing out the SA for the Nexus will probably also require some changes to the crank set but also big changes in performance. When I up graded to a Dahon MU the Nexus/Patterson drivetrain was transferred without a hitch.