Is it time to upgrade my Mac?
Forgive a basic question from a middle-aged man, but I'm wondering if it's time to upgrade my iMac. It's a late 2013 21" with a 2.7 GHz Quad-Core Intel Core i5 processor, 8 GB 1600 MHz DDR3 of memory, & Intel Iris Pro 1536 MB graphics. I've recently updated my OS to Catalina. I use Lightroom, Photoshop, & Luminar 4 quite a lot - just about every day - & I've noticed a lot of lag recently (I've only purchased Luminar 4 in the last month & it's only now I've noticed the worst of the lagging). Often Luminar will crash or it takes a long, long time to save back to Lightroom. Is this more a question for Adobe? Or, considering the age of my iMac, is it time for me to buy a new computer with more processing power? Thanks!
PS: Please don't be too technical with any answers....like I said, I'm a middle-aged man with a middle-aged man's knowledge of technology....
iMac 21.5″, macOS 10.15