Large code bases in an IDE, program dumps, large applications (the software I write will gladly use 10-20gb in some use cases), VMs, large ML training sets, &c.
128gb is likely overkill, but I can see a use case depending on what you're doing.
I think everyone should get more ram than they think they'll ever need. 32 gigs is that number for me, but if I thought I'd get even close to using 64 gigs, might as well go for 128.
128gb is likely overkill, but I can see a use case depending on what you're doing.