Comment by rwmj

The Arm guy is talking nonsense as you'd expect. Fedora & the vast majority of packages have been ported to RISC-V since 2016/2017. Debian about a year later. I just started a PostgreSQL server on one of my (four) RISC-V machines here:

  ● postgresql.service - PostgreSQL database server
     Loaded: loaded (/usr/lib/systemd/system/postgresql.service; disabled; vend>
     Active: active (running) since Sun 2022-02-13 06:56:50 EST; 1s ago
    Process: 1861715 ExecStartPre=/usr/libexec/postgresql-check-db-dir postgres>
   Main PID: 1861722 (postmaster)
      Tasks: 8 (limit: 9510)
     Memory: 15.6M
        CPU: 262ms
     CGroup: /system.slice/postgresql.service
             ├─1861722 /usr/bin/postmaster -D /var/lib/pgsql/data
             ├─1861746 postgres: logger
             ├─1861752 postgres: checkpointer
             ├─1861753 postgres: background writer
             ├─1861754 postgres: walwriter
             ├─1861755 postgres: autovacuum launcher
             ├─1861756 postgres: stats collector
             └─1861757 postgres: logical replication launcher

  Feb 13 06:56:50 five systemd[1]: Starting PostgreSQL database >
  Feb 13 06:56:50 five postmaster[1861722]: 2022-02-13 06:56:50.>
  Feb 13 06:56:50 five postmaster[1861722]: 2022-02-13 06:56:50.>
  Feb 13 06:56:50 five postmaster[1861722]: 2022-02-13 06:56:50.>
  Feb 13 06:56:50 five postmaster[1861722]: 2022-02-13 06:56:50.>

The biggest problem I had was remembering the name of the Fedora PostgreSQL package and that I had to initdb before starting the service. If the Arm CEO really believes software compatibility/availability is Arm's moat then I'm afraid he's in for a big shock.