What JenniNZ said!
SUPER CUTE!! Short trenches are having a fashion moment - (and my posts about that are ready to go).
To answer your question, and FWIW, this is my opinion
It won't date, Carla., I don't see how items date - (these days) - if the fabric isn't dated. Fabric does date! I see items in thrift and vintage stores that are completely unwearable because of the fabric - not because of the style, colour, fit or silhouette. An outfit combination can date, and you might personally be done with a look - and THAT is also extremely subjective!!! Doesn't mean the item is dated. A plethora of YouTube style channels will tell you what is "unstylish and dated" - and someone is wearing the look or item beautifully on IG, on the street, or in Vogue. It's laughable!
Case in point. WIWs on this forum: Look at Jaime, Mary Beth and JenniNZ regularly wear items with verve and sass that are decades old (the fabric and quality has miraculously lasted!) In refreshed ways, in current ways, with their personal stamps. That's stylish!
This brings me back to this trench and what Sharan said. It's made of fabric that is wearable for at least 10 years. Hopefully the quality will last that long too! I can see this look work seamlessly into your classic style, Carla. Especially if it's not too oversized. Watch the fit in the sleeves and shoulders. That's all the info you need at this point.
I refreshed my Spring and Summer outerwear capsule with a short oversized trench coat! My '80s gene wanted a BIG version of the look, so that's what I did. It's good over my BIG knits too. This is what I got. I'm excited to wear it when it's warm enough!