There’s an implicit story here which I find quite sad that not a single developer at Rockstar in the prior eight years had the autonomy or bandwidth to discover and fix this themselves.
Perhaps this might not be appropriate in the gaming industry... and who knows if Rockstar don't already have this.
However, the GTA loading time is horrendous (and I had a spectrum sinclair when I was a kid) - surely there must have been a work item, ticket, bug reports, or whatever, for this.