I could buy a PS4 and use it for the rest of my life
If you're amazingly lucky. In actuality, you've got to replace it (or have it repaired, which is usually almost as expensive) every few years because it wears out.
And you've got to continue paying for electricity to run it all that time. And the TV (and replacements/repairs for it) to play it on. And the electricity to run the TV. And a payment for the dwelling in which it's housed. (Which you can buy outright… but even if you do, the payments for upkeep and the taxes to keep roads/etc coming to it end up being of a similar order…) Etc, etc.
In practice, unless we lived under a radically different system (far more different than [state] capitalism with/without a guaranteed minimum income, or communism), we pretty much have to have a system in which everyone can afford to continue making regular payments on many if not most of the expensive things they use.
If you're amazingly lucky. In actuality, you've got to replace it (or have it repaired, which is usually almost as expensive) every few years because it wears out.
And you've got to continue paying for electricity to run it all that time. And the TV (and replacements/repairs for it) to play it on. And the electricity to run the TV. And a payment for the dwelling in which it's housed. (Which you can buy outright… but even if you do, the payments for upkeep and the taxes to keep roads/etc coming to it end up being of a similar order…) Etc, etc.
In practice, unless we lived under a radically different system (far more different than [state] capitalism with/without a guaranteed minimum income, or communism), we pretty much have to have a system in which everyone can afford to continue making regular payments on many if not most of the expensive things they use.