I have a collection of 50mm lenses (from the 1950s to 2018). Most of my favorite shots are actually taken with the older, imperfect ones. Some people call these "character lenses", which have flaws that can actually be quite appealing. Most of them are sharp enough and the flaws disappear if stopped down a bit.

Examples of flaws include swirly bokeh in the background, a glow around high-contrast edges, and flares from lights.