Are Icom living in the last century ?
No, they are not.
While I would prefer the Icom R15 support digital modes, considering the frequency range it covers, it is intended for Aeronautical, Marine, and Rail...of course there is additional analog to monitor beyond that. Yes, it costs more than a Uniden BC125AT or Icom R6, but look at the size, battery life, recording, dual RX, screen, MicroSD and Bluetooth features. There's definitely value in those additions over the R6 or 125AT which makes it relevant. ( People are buying and enjoying it )
I enjoy my Icom R30, but at used prices it is double the R15. If I didn't already have a boatload of scanners and receivers, I would have purchased the R15 at the $409 price when MTC Radio had it on sale. While I plan to purchase the R30 successor, I would purchase a used R15 for $300 while I wait. I would not mind using the R15 along side my R30 especially when traveling and or camping. Two receivers doing the job of four would suit me fine. Well, my TRX1 would come along as well to handle DMR and P25.
Icom is not tricking anyone into purchasing the R15. Not everyone has a boatload of receivers & scanners, so the R15 does make sense for particular buyers.