Just to chip in that we can look at the ICV2 numbers of what game stores think are the hottest games for another perspective on what is popular - broadly; retailers think Star Wars and Starfinder sell with Alien as a hot new thing.

The following is a ranked list of how often games have placed in the top 5 since 2015 (13 reports; D&D appeared in all of them to give a sense of perspective)

Dungeons & Dragons 13
Pathfinder 12
Star Wars (FFG) 11
Starfinder 5
Shadowrun 6
Fantasy/Dragon Age 3
World of Darkness 3
Alien 2
Cyberpunk 2
Iron Kingdoms 1
Adventures in Middle Earth 1
Call of Cthulhu 7th Edition 1
Genesys (FFG) 1
Legend of the Five Rings (FFG) 1
Star Trek Adventures 1
Fate 1

This focuses on the US market but given that is ~2/3 of the whole show we can say it should be representative. I am alas too new to post a link - google "ICV2 rpg sales"