OP is about 70 years old
-Rides 150 miles per week
-Pulls 14% road grades
-want's to buy a new bicycle
-can afford to buy a new bicycle
I really cannot see any reason not to get one! I'm younger, 62 and ride a 15 year old Cannondale Synapse 3x9. If I have in 2021 and 2022 a year anywhere near my 2020 year, that is 6300 mile, I'm reasonably certain that this hobby is not going away and will start planning a new purchase.