As I understand it, Meltdown and Spectre are only bugs when there is malware already on the pc and therefore can exploit the slowdown error in the pc chips - note - the exploit is on apparently every pc chip irrespective, then the bugs can use this exploit to mine the information they want ie passwords details etc when the info is expected to be needed by the pc, eg, if you look at a bank account web site, the pc starts to look at the passwords well before you get to start entering the details and if you suddenly decide not to go ahead and close the web site (say someone came in the room that you did not want to see what you are looking at) then the information it collected is dumped - that's the information it can mine to send to those looking to steal it, remember the computer needs to be infected with malware before had to allow meltdown and spectre to be loaded in the background.
I agree that a dose of Epsom salts needs to be applied - electronically speaking.