I haven’t said anything about Meranti and Co either, FSC doesn’t exist anyway, except on paper (I come from the wood sector). Good coatings are based on oil (sunflower oil); I would never slap anything else on wood, but for that, you have to go to a specialist store, not the hardware store...
If you have ever installed different glazing in an old building into a heavily profiled wooden window where the panes had different thicknesses, you will quickly notice the advantage of wooden windows if the carpenter can sand the sash to the new size accordingly...try that with a plastic sash. Although the plastic sash is probably at the end of its lifespan anyway... We did this at my sister-in-law’s house with windows made of local oak, about 60 years old as far as I know...through modernization, new window panes were installed, which fit into the existing sashes through the adjustment work (the pane was correspondingly thicker than a 40-year-old pane).