Guys, you are quite critical and in my opinion, IXEG 737 deserves attention and respect.
Yes, there have been no updates for quite some time, but the developer wrote the reason. The second point, they are working on the update, in particular, improving the work of the FMS, radar in accordance with the latest updates of Xplane 12, as well as other fixes.
I am a scenery developer in the past for Prepar3D, now MSFS and I understand the reasons for the delay, especially not so long ago, the development team gave a full answer to their plans and the reasons for the delay.
Each of the developers has their own life, problems, for example, I live in a country that has been under military attack and has been at war for the fourth year.
If you don't want to spend your money on something, don't spend it, no one is forcing you to do it.