I know of drivers who got to 200k on the Hyundai-Kia cars but the direct injection engines were very troublesome with many replaced as yours was. I basically retired from auto repair in 1999 so not familiar with the newer systems. My recommendation is assuming you have an honest repair shop and they can get it running right without a CEL (check engine light) then keep up the maintenance and as long as the CEL stays off you should be good for some time with the converter issue resolved.
Should you sell it or keep it?
AS long as it does not become more of a money pit after the converter replacement, the rest of those vehicles seems to be reliable. If that proves to not be the case then It's time for a replacement.
Take care of the oil changes, watch the fuel mileage, use some Chevron Techron to keep the injector spray patterns optimal for longevity.
Be on the lookout for a replacement especially if it is your primary transportation. If you see a real bargain, like a garage kept Toyota Camry before 2003 with the 2.2 liter engine or after 2008 when the newer engines had the bugs out then grab it and sell this car. Check the forums on anything you are considering as a replacement. There is a lot of real junk in the used car market right now. Let us know on this thread or a new one what direction you are taking. I'll be glad to do some research. We bought a new 2016 Sorento but traded it on a Nissan Rogue but the dealership where we bought the Rogue had a lifetime warranty on the power train so that should cover the potential CVT transmission replacement.
I hope you get fair treatment and the shop concurs with my advice and will keep an eye on anything else so you can stay ahead of another expensive repair.
The advice you just got from me is exactly what I would have told on of my good customers, but it's been 25 years since I got out of the business.