Why might it take so long to start up a cleanly-stopped instance?

PG 14.15 on RHEL 7.9

This is a rather small system, and only one or two user connections existed
at the time.

$ pg_ctl stop -wt9999 && pg_ctl start -wt9999
waiting for server to shut down........... done
server stopped
waiting for server to
start.................................................................................................................................................................................................................................2024-12-14
13:21:10.820 EST 24567 00000 LOG: 00000:
redirecting log output to logging collector process
2024-12-14 13:21:10.820 EST 24567 00000 HINT:
Future log output will appear in directory "/var/log/postgresql".
2024-12-14 13:21:10.820 EST 24567 00000 LOCATION:
SysLogger_Start, syslogger.c:674
. done
server started

--
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!