I notice programs like Adobe Photoshop/Illustrator open almost instantly, so games will also benefit but probably once the data is cached in the RAM. Never blue screened, ever!
I have a laptop so it has a battery, that's one.. Two...I live in Dubai, electricity NEVER EVER goes out...we're in 2014 not 1994
stop worrying too much
also, every person in this world must have regular backups to an external HDD whether or not they are using RAPID, RAM caching software, or nothing. backups are a MUST if you ask meh