3000 hrs of tape airspeed indicators and 18,000 hrs of round airspeed indicator.
There is a transition going from round dial to tapes. It's like going from a analog to digital watch.
Once you get adjusted to modern airspeed tapes, IMO, it's better than round dial Mk 1. Buffet margin, stall speed, etc, is constantly displayed.
The biggest weakness, but a more related to altimeter and VVI/VSI instruments, is that you can't glance at the gauges and INSTANTLY get feedback (a la an analog watch). Altimeter at 12 o'clock is the required altimeter and VVI/VSI at 9 o'clock means the airplane will stay there. With tapes it's harder (a la a digital watch).