The Zenfone 9 leaves a positive impression in our test. In addition to a high performance and very attractive gimbal technology, the Asus smartphone includes extensive equipment such as a low-noise 3.5mm audio port. On the other hand, there is still room for improvement in the update support. https://www.notebookcheck.net/Asus-Zenfone-9-verdict-The-software-support-of-the-small-flagship-smartphone-is-still-lacking.651237.0.html
Considering that many people are ready to buy new phones after the 2-3 year mark makes the update cadence seem pretty standard, especially given the lower cost of the phone against other flagships; so I'm not so surprised.