20th Anniversary promotions

Our company is celebrating our 20th year in business in 2024.  We are thinking of purchasing additional marketing materials to advertise the fact to our customers at trade shows.  My question is, does anybody care?  Does a milestone event actually generate more sales?  Or is it just an ego boost?

If your company has done this, was there any ROI?

If you were buying for the first time from a vendor, as a customer would you be any more likely to buy if the company had been in business for 20 years, as opposed to 19 years or 21 years?

Thanks for your thoughts!