Hi, what if my work visa expires, will the visitor’s visa come to work if there is like 5 years left till it expires?

Thank you

I have a 10-year visitor’s visa. Would applying for Tier 2 cancel my Visitor’s visa?

What about vice versa? If I have a Tier 2 visa and then go on to also apply for a visitor’s visa just in case for when I quit the job but still want to visit the UK. Will this invalidate anything?

Thanks!