I’m always riding on the flats or the drops

I always did the same on my road bike (a Cannondale Cadd-8, not nearly as antique as your bike here). Last year I gave up and mounted straight handlebars. I like the steering leverage better and if I want to tuck I have aerobars mounted for that.

I love old bikes, but I think the only thing about your bike I wouldn't like is the downtube shifters. I haven't used them since my old Raleigh in the '80s, but I remember struggling with them and having to devote a lot of my attention to them while riding.