There are 2 sides to the discussion of arm imo. On the arm side you have the pros of :
big companies still using their design licenses, for example mobile phones
with apple making their own soc based on arm, we could see the general computing landscape move away from x86 based computing ( including x64 ) and into arm
the single board computing world ( think raspberry pi, quartz64,… ) has moved onto arm with the popularity of the raspberry pi
low power usage
some data centers ( like aliexpress’ ) have moved towards arm cpus
On the RISC V side the pros are :
low power usage
arm as a company has become a bit toxic. I know somebody that worked for arm and left because of the office environment
despite people shouting “RISC is the future” since the early 90’s, there have been development on the platform recently, mainly a few development boards and single board computers being made and released that are RISC V based and are at decent price.
This is just my knowledge of the discussion, and its a very high level one imo. Feel free to reply and educate me on the subject, specially the RISC V side