Agree with the above. The CSS 737-500 for MSFS was so popular that CSS had their servers crash because so many people wanted to download the aircraft, it's exciting to see that there is a good demand for the 737 Classics.
I know X-Plane is a significantly smaller market compared to MSFS, but there have been various constants that I've noticed
1) People love the IXEG aircraft, it's a jet that has really held the test of time and is to this day a really solid aircraft
2) People want the other varients, the 737-400 and Freighter have consistently come up as a desired expansions for the IXEG product.
However - it's hard to recommend and convince people when there is no real idea of what the IXEG team are doing and whether the next update will be a minor update, address known issues, or completely revamp the aircraft. I think a lot of people want IXEG to do really well (myself included) because I think it's truly an excellent aircraft.