We don’t want to go down this path though:
Vivaldi is at 0.05% market share, we ought to do Yandex and UC Browser well before it, and then when do we stop? At the moment to keep things simple our detection simply should stop at Opera, which technically is almost Chrome cause it runs Blink but still.
Windows mobile is almost dead, Microsoft started killing it in 2017.
The only impact of these nits are cosmetic in the list of sessions.