LinuxCNC S-Curve Accelerations

Jerk limit to the point of seeing your machine move sluggishly? Béziers are Just to be able to get better cornering speeds, because tangent arcs are not optimal for covering with jerk limit.
Scope of planner type 1 is jerk limit to a crawl if necessary? Like the 0.0001 G2 curves that ruediger123 shared. Done with small G64P tolerance, I agree those should just slow down as much as you need to follow path within tolerance, BUT for a square with NO programmed corners, blend with arcs and parabolas are acceptable? Just slow down as much as we need to follow the blend arc? Point cloud line to line is another issue, slow down to keep everything smooth? but then you will see the machine smoothly follow your point cloud, but it will speed up and slow down, speed up and slow down, because we are not trying to maintain velocity, we are sacrificing it, and because we work mostly segment by segment, I don't see an easy way out, Béziers could give us a better path, but we will need to figure out where and how to stitch them smoothly. and how to do it while the machine is in execution, we can't plan the whole thing offline.