So many comments debating the philosophy around this. I like it when these type of sites open a new tab for me. Is there a way to just code in a toggle between the two link opening types?
Sometimes it's easier to follow a link, have a look, and then go back without jumping around tabs.
Default, on the same tab (since browsers have options around this), but allow users to select if they want it on a new tab/window.
Back/forth, new tab, currently open tab switch, bookmark, needs to be redesigned from first principal. They all approximate different versions of similar intents.