If this website
shows that your Switch is patched, it likely is, and you're out of luck right now unfortunately.
To date, the only iPatched switch than can run homebrew/CFW are the ones shipped with firmware 4.1.0 and something similar.
For now, your only option is to get a second hand one that's not patched, but beware of the inflated prices on said devices, as many people take advantage of the fact that the switch they are selling is hackable. It's unlikely to find a hackable switch on store shelves these days.
As for the chances of running unsigned code of the warmboot kind on FW 7.0.0/1...well chances of that are slim, and we never know if it may happen or not as Lacius above said.