Completely agree! I upvoted the idea post about this as well. I'm really hoping that WF considers adding this soon. We're about to kick off our implementation into the platform and I know that our team is going to be really nervous about losing timers for the reasons you specified a couple years ago here.
Per Andrilita Rodriguez's suggestion earlier, I looked into Toggl also but I'm having trouble getting it to work and am not looking forward to paying for another tool for a feature that should honestly just be part of Workfront.
Still looking forward to moving into WF but definitely would love to see this feature added soon!