What do the well-crafted logos of equally successful companies represent?
Depends whether they are public-facing or B2B ...
A public-facing company, like Apple, has good reasons for carig about its logo.
A B2B company like TSMC is well aware that people buy foundry time based on its technology, not on the prettiness of its logo.
Does it matter? Maybe it does.
With Pentium, Intel made the decision to become public-facing, to make the public care specifically about buying an Intel CPU. And for maybe 20 years this seemed like a fantastic decision. EXCEPT that at some point in the process, Intel started to actually believe that it was primarily a marketing company. More effort seemed to go into SKU segmentation and the next campaign than into designing a better product. At some point true insanity set in, when 10nm was essentially rendered unusable for many many years. And why? To be able to make (ultimately very hollow) marketing boasts about having highest transistor density.
Once you allow marketing to be even a small part of your worldview, it's very hard to stop it from taking over. How many companies have gone that way? Sony? Check. HP? Check? Samsung? Already happened to the products, happening before our eyes as a repeat of Intel, on the foundry side. Boeing probably followed the same path, though I know the history much less well.
TSMC seem aware of the danger and intent on saying: marketing gets this far and no further -- you don't even get a logo redesign.
Or to put it differently, when the logo redesign happens, start thinking about selling your TSMC stock...