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Thank you for that re-assurance.
I had a 10-speed, (2 x 5), moment recently,
pulled away from a set of traffic lights,
and in a moment of relaxation/day-dreaming/distraction,
'automatically' reached for the down tube shifter,
which of course wasn't there!
(Apart from a couple of miles on mespilus jr's 653/friction 105
I haven't ridden a bike with down tube shifters since the early '90s).
I'd be pretty relaxed about that, but then I grew up in an era when double chainrings were a novelty and they certainly didn't have any ramps/pins/lowered teeth. Using a 36 with a 50 might take you back to shifting that's only as good as the previous component generation, not the previous millennium. 36 officially works with either a 46 or a 52 anyway, so the synchronisation can't be that critical.