Any drawback to keeping the drum spindles on my 66 Valiant?

AJ/FormS said

You couldn't give me 9" spindles.
You couldn't pay me enough to install them on my car.
You'll know why, when you see your wheel rolling down the road in front of you, hunting for a target. There are bigger bearings on lawn gliders, than are on the outboard end of one of those spindles.

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Yeah, I've broken a track rod (strut link) on my Mustang, fortunately not at speed. Really not something I want to repeat with any suspension part. But I'm getting older and don't often drive as hard as I used to. That's why I am trying to get as much information about the 10" drum brake spindle as I can. Not too scientific, for sure, because people don't drive the same and all the installations are different, but the experience here does matter to me.
It's easy to be tempted into the bigger, beefier, is better way of thinking. But I think it's fair to consider the alternative of keeping the 10" spindles.
And thanks for your input - I definitely would not use 9" drum spindles, even if I had them!