Yeah gunk gets you home but the tyre is a write off.
I'm hearing from friends and colleagues that breakdown providers no longer send recovery capable vehicles as a first call....saving those for after the initial assessment is done by a non-recovery asset.
Which means you call, say "my wheel has fallen off" or "my gearbox has seized" (my friend on his bike the other day!) and wait hours, then wait hours more because the first guy says "its gonna need recovery".... when it was bloody obvious from the outset.
Get yourself a space saver? I've got one in my Mk8....