If the points rubbing block wore down, which they do with mileage, your ign retarded & you would have lost mileage & HP. It is gradual, might be hard to notice, but it happens. Assuming the timing was correctly set in the first place.
With elec ign, timing doesn't change with mileage, a more powerful ign system [ compared to points ] can be used such as HEI module + E core coil, allowing for 0.060" plug gaps, more reliable starting. When you look at the percentage failure rate of elec igns, it is very small & in my opinion the pros outweigh the cons.
The most simple elec ign to wire up is the HEI 4 pin module. No bal res, dead simple, compact, mount anywhere convenient. Another HEI benefit is variable dwell, important if high rpms are to be used. Points & Ch ECUs do not have this.
The module is the most likely part that could fail & if you are worried about it you can keep a $25 spare in the glove box....Takes 10 m in to change...