Yikes, this thread is starting to disturb me a bit. I never worried about whether my suit coats seemed out of date because they were too long before now! One thing I thought about is that in the past I have been around more people wearing suits, so I had a better idea of what the current "norm" was for things.
I am sure that like everything else, longer jackets will be back in fashion, soon enough.
Timeless style will always look good.
For those who focus on current fashion trends, you will look hopelessly out of date. But they always focus on "the current thing" rather than trying to figure out if "the current thing" is actually "good". Five years from now, they will have thrown out all the "in" clothing they wear now.
You are fine.