At the 2.1DME point you are going to be at LOC mins at 338ft AGL on a 3deg slope. In a jet, if you don't have the runway at that point, you are not going to be able to complete the approach meeting 'stabilized approach criteria". In a small airplane, drone on to the 1.2DME realizing that with each second, you are creating a steeper and steeper path to the runway and unless you are in a helicopter and can hover down, at 1.2DME the glidepath is 90deg.
Obviously, another factor to consider for an open ended question is how much runway will you require to get stopped.