Conventional to Synthetic after 7 years?

I used to use a local Jiffy Lube for oil changes on my cars using mineral oil. When I bought my 2018 Accord 2.4L, I found that they wanted $90 for the full service instead of the $40 with mineral oil. Synthetic oil doesn’t cost $50 more, and I stopped using them. This particular store does good work, but the price is outrageous. I use my repair shop now at a relative bargain price of $60.