It's curious that we don't hesitate to call a 'solenoid' a 'motor', even though they are actually quite different.
This can be very confusing for newcomers, especially when they eventually discover that turnouts CAN be powered by conventional rotating electric motors instead of solenoids!
There is an amazing amount of ambiguity and innate ability to confuse in model railways, probably the most common being the other terms used for turnouts - points and switches, which terms are also used for other purposes.
No wonder 'normal' people think modellers are strange!
With reference to the possible need for enough current to power several solenoids more or less simultaneously: this can become very important, in fact essential, when operating automated fiddle yards with several passing loops, most especially with double main line traffic. Every train entering its controlled passing lane will activate, at the very least, two turnouts, all on its own. In addition, you need to allow for the same thing happening at the same time in the opposite direction. So that involves an absolute MINIMUM of 4 simultaneous solenoid operations and that is completely discounting any other operations elsewhere on the layout. So, in this type of layout, it can be seen that the oomph to operate at least six solenoids simultaneously would be an absolute necessity. The juice to operate eight or even ten of them would be much better and highly recommended.
If I ever get my main N Gauge layout operational again, I seem to recall that it has a cluster of six hidden passing routes, plus another four in the main station and another two on a branch line. Plus a few dead-end sidings here and there. This takes quite a bit of juice to operate the solenoids effectively and and I installed a 16 volt AC transformer to power them exclusively, together with a capacitor discharge unit (CDU), which, later, had to be swapped for a bigger one because it couldn't handle the demand. The solenoids didn't burn out, the CDU did!
Because they don't need anything like this, branch line operators may not appreciate this particualr need, but I assure you it is true.