One more comment from this section of the peanut gallery. From time-to-time I see vintage bikes outed on the C&V forum where the owner (sometimes now deceased) has modified their treasured steed from the 50s, 60s, or 70s so they could keep riding it. That often provokes snickers from some, but I'm always impressed with how the owner kept riding it.
In Italy (in particular), it seems many old race bikes were turned into city bikes, outfitted with manubrio condorino, fenders, maybe even a newspaper clip on the fenders or a chain guard. This was probably as much out of necessity as a labor of love, but offers another example of continuing to ride a bike your body has aged out of. I have an early 70s Atala Super Professional that's currently hanging in the basement in nearly bare frame form, but it will get a similar treatment when I get back to it.
Long story short, get whatever you want. If you out-age it but still love it, modify it in whatever way you want to keep riding it.