1) Can you get 7-10 years out of it? YES. Easily, you will not wear it out, you will be the only limiting factor, will you get the "I want a new bow" bug? Will something "cool" come on bows in that time frame? All up to you.
2) Is Mathews worth it? Again, as has been said above, several times: Yes, they are good bows, but DO NOT spend that kind of money unseen! I wanted to like and try a mathews, do what was suggested, shoot ALOT of bows from different companies. In my hand I could not get comfortable with a mathews, just didn't work for me. Same exact bow in your hands may be the best thing since sliced bread, all personal opinion.
The best way to do this is an outdoors show of some sort where HOPEFULLY you can shoot multiple bows side by side. Harrisburg PA, pre-C19, did this for me. I shot Mathews, Hoyt, PSE, bowtech (wanted to like them but didnt as well), Bear all side by side. If you can find that it's worth it
Another aspect, if you can't work on it yourself, you want the local shop to carry whatever line you pick.