I certainly wouldn’t rent software, if I could help,it. For a casual user, like myself, no software would be worth renting.
Software would be worth renting if I needed a feature very rarely (like once or twice a year), but I really needed it then. If I could rent it for a few days (or even a month) instead of buying a full copy of Photoshop it might be worth it. On the other hand renting software full time would be like leasing a car - a good way to flush a lot of money down the toilet in a hurry.