Correct;most of the U.K. registered EMB145s do not have t/r.
They add $500,000 to the sticker price and reduce payload by half a tonne.
On the other side of the coin ldg performance without t/r is very poor and brake overheat a regular feature.You do need ballast if empty but also 400 Kgs in the rear hold if full with someone on the jump seat.
An even worse idea is
A. Having no fire ext. system in the rear hold(within pressure hull).
B.Not taking the option for a fire detection system.