I am technician in an arcade, so I go there pretty much every day.
The reason the switch is made to redemption is simply because classic arcade games don't deliver any income anymore.
Normally, a machine should rewin it's cost price within the first year. Every extra years of exploitation are a bonus.
Guess what, if you buy a dual sitdown racer, you need at least 2 or 3 years before it's payed off.
This means it's hardly worth the trouble.
For instance, take the sega outrun II.
The arcade cabinet came out, and a few months later, the game was available for pretty much every game console on the market at that time.
As a result, the machine doesn't make profit anymore. The misery even goes further. Due to the low income of the machine, the owner doesn't want to spent much money on repairs.
As a result, the machine becomes less fun to play, caused by issues like force feedback no longer working or screen faults.
Redemption isn't something you can play at home.
Unless they will interface the PS4 or XBOX ONE to the newest model 3d printer so that it can print it's own stuffed annimals, it's something that replaces the classic videogames, not because they make "more income", just because they still produce "an income".
So, if the idiot owner doesn't has personel in it's gameroom, it's simply because he couldn't affort to pay one's salary anymore. You have any idea how much vandalism is happening in an arcade, even when there is a supervisor on duty? A lot of parents just let their kids mess with the machines without coins in their pockets, and they have to do something with their fustration.
I remember repairing and restoring a Killer Instinkt some years ago after it was stored for several years due to a broken harddisk. We placed it back thinking peple would like to see such an oldie again. Totally wrong move. The coin box remained empty, so it didn't even pay the electricity it consumed. So, even keeping older arcades in mint condition isn't usefull, and that's why you don't find them anymore in the arcades. There are some exceptions, like the sega daytona, which we still have in exploitation.