For the 50 and especially 60+ riders, if you ride a bike with a level top tube, do you have any physical issues that would cause you to switch to a sloping tube?

I have a Merckx with a level top tube and I find it fine right now. The bike is a little big for me, but there is about a 1.5" drop from saddle to bars. I am going to have a new bike built and aesthetically, I prefer a level top tube. At least one builder I have talked to suggested a sloping top tube because of a lower step over height and some other reasons.

While I can see some comfort issues with the sloping top tube, if I am going to have a bike built, I would really prefer the level top tube. Any reason why I should consider a sloping top tube, or should I just go with my aesthetic preference?

(on a good day I can touch my fingers to the floor without bending my knees)