Spectre however, is a design flaw and although software can be effective in mitigating some of the issue, Spectre is something that planet earth will have to live with for the next few decades.
Spectre is going to change the way you do things. If you do not change the way you work: your passwords will be stolen, you will have issues and you will become part of a botnet.
The only solution and mitigation against Spectre is to change habits, stop the execution of programs from websites, to use more text based email programs (not automatically open attachments)
Replacing cpu’s and all the devices on planet earth will take decades and is not an option, although the 1% will probably all have brand new devices within weeks… The 99% however will be stuck with broken hardware for a decade or more.