I think the frequency with which you update your computer is highly subjective. I have gone everywhere from weekly, to daily, to hourly, to yearly. All equally fine for the machine in question, and updates carried out without a hitch.
If it isn't broken and does what you need, why update, you know what I mean? Especially if it isn't connected to the internet in some cases. 😁
Regarding what you linked to paccache, which setting(s) were you referring to specifically? I don't think I was able to understand that it is directly suggesting or indirectly insinuating any type of update frequency. But I probably am just too tired to process. 😅