Its easy to get hung up on which is the "darling" router model used or recommended by users here. One should consider the fact that what may be popular here in these subforums may not be as popular with the masses who don't visit this site, don't use Asus-Merlin, and are not power users or tinkerers who want or need the latest and greatest bleeding edge super fast router (or have the fastest broadband). Some just want an affordable router that suits their needs at that time. Some don't have the latest hardware so 2.5Gb or 10Gb LAN/WAN or the fastest WiFi features on certain routers end up being an added expense that goes unutilized and unused.
For many years the RT-AC68U (and the derivative TM-AC1900) seemed to be extremely popular here, and still are to some extend based on the posts by people still seeking help with them. It had a good mix of features and affordability for a good number of years. Right now there seems to be a mix of "popular" models out there that people are using. From the RT-AC86U to the RT-AX86U/S to the AX88U to the AX series Pro variants to the GT-AX6000 and others.
Simply put for people who are reading this thread wondering what Asus router to buy. Look at your needs and wants and possible future expansion and what you can afford then match those with the
many Asus router offerings. If you want or need to use Asus-Merlin then consult the supported routers (
see this link). The latest and greatest, or the often recommended Asus router model by certain people here, may not be what you can afford, or be best for your use needs.