I personally love it when races are run without radios. The UCI tried to ban them in 2010 but the pro teams rebelled, claiming that they were essential for safety reasons; the number of crashes at the 2021 Tour de France would suggest that they aren't succeeding very well at that core function.
Radios make the races formulaic. Not necessarily predictable but certainly a different event. I can't think of any other sport where pros are held to different rules (i.e. allowed technical assistance) compared to amateurs.
[1] https://crankpunk.com/2012/11/09/robert-millar-the-case-of-t...