We used to do IRS alignment on all turnarrounds in my company, now we do not.
I always check for drift as I regularly fly 3 to 6 hrs legs: the drift is always great and in the range of 1\4 to 1 mile, so , dependent on DME DME triagulation update that Airbus did NOT have an accurate LNAV position after 4 to 5 hrs flt from Toronto!
The ILS drift ,on the other hand, is generally less then 1/10 degree per YEAR if I remember correctly from my Calibration Flights.
Oh, and they killed the FD when the Cpt disconnected , ca 4 miles.
Again I fly the odd visual, but generally with full automation to assure no OFDM trigger.
Come to think of it the last one was to CPH and the A/C two places ahead of me made a G/A from a botched visual?
If one wants to practice manual visual, providing the Company SOP let You, a busy International airport at night , at 03:00 BodyClock is not smart. As proven here.
Regardless WTF the clearance was!!!
Is this so hard to understand!