Have storm chasers ever bothered to get close to the big boys? Ef4's or 5's? Definitely not this close but close enough to call it close.
Not that close, unless they have a death wish. Two different realms in terms of damage, cell size and sheer intensity. The 4's-5's have 150-200+ mph winds, incurring larger debris and hail. 2's are just above 100 mph, if memory serves and while it doesn't seem like much? It is night and day. But I still think it is somewhat ballsy, albeit unsafe to get that close to even a 1 or 2 like these chasers did. It makes you lax and complacent.
The Wray tornado has already documented that another pair of storm chasers were about 100 yards from it at one point. You should not be getting closer than a 1/2 mile or so from a debris cloud on a 4 or 5. While the risk and thrill influence storm chasers, safety is paramount. The larger debris will demolish a vehicle, even the TIV (which was getting rattled around pretty good in an EF1).