The phrase "tasteful upgrades" refers to improvements or changes made to something, usually a property or an object, that are done in a stylish and aesthetically pleasing way. Full definition
Beautiful ground floor Wailea Ekahi unit with tasteful upgrades located on the expansive Keawekapu b... (islandsothebysrealty.com)
The current owner has put just 300 miles on the car since they purchased it a year ago, and has since installed a bevy of tasteful upgrades. (automobilemag.com)