I have never bought into the "film look" or the "character" of older lenses. When I shot film I bought the best lenses possible, think 50/1.4 AI-S, 28/2 AI-S, 135/2 AI-S, 200/2 AI-S, and 400/2.8 AI-S as well as Canon FD 17/4, FD 35/2, FD 300/2.8, and FD 400/2.8.
I also photographed using the finest grain films, like K25, K64, Velvia 50, Ektar 25, and TechPan. I have digitized many of these film images, and digital prints do not look out of place beside my pure digital prints.
My current old lenses include the Nikon 8/2.8 AI-S, Canon FD 50/3.5 Macro, FD 55/1.2 Aspherical, FD 800/5.6 L as well as a couple of medium format lenses. All of these lenses can challenge current lenses on a 50MP DSLR. Most of them do require some easy CA correction in post. I have had brand new current third party lenses which require huge CA correction.
I have always avoided poor films and poor lenses and I do not accept 70 year old discolored slides and negatives as a good inspiration for photography.
Absolutely continue buying AI and AI-S lenses, many can easily compete with current lenses. Unlike many Nikon AF lenses they even work on Z. If you like weird effects, low contrast, and image ruining flare, I too would look back to the pre-AI lenses.