It will depends on how many PC components you need to upgrade. In my case, my PC Gamer has 8 years old. The only upgrade I did a few month later was to change my old GTX 780 by a GTX 980Ti generoulsy gifted by my little brother who change it in order to put an RTX 2080 in his PC.
For Christmas or later in 2021 I will take a new motherboard, new Ryzen CPU, new RAM, new Nvme and the RTX 3080. It will last for another 7-8 years I don’t need to change my DD, Box and the Ventirad It will cost around 1’500 CHF (for 7-8 more years).
A new PC Gamer could fit the mustachian way if you think to use it for many years without changing any compnents due to “marketing evolution”. Here with the new Nvidia GPU and AMD CPU we have a real performance update for many years (like PS4 to PS5 if you want to compare for console).