I have not so much experience with the live time of wooden windows, but a bit about aluminum alloy windows, which have also an internal drainage system.
Maybe the principles can be transferred to wooden material windows (minimum double glazed, not single glazed).
These Windows have inside the frame, as a minimum, two rubber rain protection layers.
The outside rubber protection layer is the protection layer against hard rain attacks
(german word: Schlagregen), which of course is not a 100 percent protection.
The next internal layer (direction to room side), with separate rubber sealing, protects against what comes through the outer layer. Between both layers, there is a drainage system, with small outside openings, to ensure, that the water can drain. These openings also helps the dry effect, in relation with the outside air, during dry weather phases
A far as I know, the newest generation have 3 protection layers.
In case of aluminum alloy windows, frame internal insolation material is used, to reduce the effect of thermal bridges, not necessary for wood, as it is a relative good thermal insulator itself (all related to the frame).
To make a long posting short
, the drainage concept of wooden windows seams to be promising.Single glazed windows should not be use. Due to the low surface temperature of the glass (single glass) during winter, there is cold radiation near the window, which does not feels comfortable, even if the room temperatur is high (and vice versa in summer)
Here is a link about the recommended relation, between room temperature and room surface temperature (from that, general guidelinee not more than 3 degree difference -> 21 deg room -> 18 deg surface)
https://energytools.de/wissen-erfahrung ... emperatur/
