One of the reasons for this, about seven years ago Russia put a 30%+ import tariff on any mobile phone that didn't work with GLONASS. Thereby motivating chipset makers like Qualcomm to integrate GLONASS receive features into their existing RF chipsets.

Exactly. At the moment, the consumers benefit from the increased accuracy and coverage provided by multiple GNSS.

Sidenote: the ublox M8 chips are a pleasure to work with, and there are variants that have IMUs (gyros and accelerometers) on board for sensor fusion. All for <10$. What an exciting time we live in!

> Sidenote: the ublox M8 chips are a pleasure to work with, and there are variants that have IMUs (gyros and accelerometers) on board for sensor fusion. All for <10$. What an exciting time we live in!

I wish someone would build a USB data logger using one of these. I still use one to geotag photos and record trips, but all the available models use old GPS-only chips and can be pretty jumpy when reception is poor. Having one that fused multiple GNSS and had an IMU to smooth out some of the random jumpiness would be ideal.

Yep, we use those in (hobby) drones for extra precise location data.