I need a decent laptop as a backup to my iMac Retina 27" just for general use, not concerned about bigger size of a 16", actually prefer it as my Mac will go in storage during an extended move for 3-4 months. Been looking at 2019 models, have found a few i9 64GB memory with 512G SSD, 8GB video, and retina screen in the $500 +/- $50 range (my budget for this need). Just wondering what the lifespan of that MBP would be and support for it. Have an older MBP I think its 2012 and I can't get newer versions of Safari, Firefox or Chrome to run on it... plus its a 13" and my eyes aren't what they once were (octogenarian here LOL).