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The sticky pads are staying on the frame well (too well, really) but the adhesion between the plastic cable guide/zip tie anchor and the pad does not survive the weather.
If I had thought about it, those sort of zip tie anchors are available as a braze-on and really popular now for gravel bikes and other instances where full-length outers are desirable. I should have put a few on the frame when I built it.
An easy alternative might be to drill a few holes and fit some rivnut type bottle bosses, and respray (or maybe there are stainless ones). Then the dynamo cable could be secured with small p-clips screwed into the bottle bosses.
From experience, though the frame looks clean, it still needs to be degreased thoroughly for anything to glue on it.