Re the built in power switch, the KS2 Nexts at least have an inline switch on their power cord, right?
Yes, they do.
229 publicly visible posts • joined 1 Feb 2010
The SAM Coupé was interesting but it is not part of the official Sinclair\Amstrad line, the comaptibility was via a skeleton ROM written by MGT that worked for most but not all things, or copying a ROM from your own existing Speccy 48K - there was no licensed ROM image; and it sold in very small numbers - so there's less interest in expending the effort to emulate or replicate it.
That said; I believe there have been preliminary attempts to create a Coupé "core" (FPGA implementation), but nothing that's finished yet.
Get KeePass (http://keepass.info/) instead - available for just about every platform you want and has no cloudy gubbins.
Just back up your vault to whatever offline\online service you trust. (There's even plugins to do the backups for you - if you want to trust those). The point being you have a choice and control over where the data goes.