I agree with Janet about the ab machines she has mentioned and too much spinal flexion. In general, most machines are also not “one size fits all”.
They are just too awkward and do not fit to meet a person’s individual needs (in addition to most not being very functional). They can have their place, however, for those who are beginning a workout program and for those who many have an injury to overcome. I do like cable machines for certain exercises.
My ideal place would have the following: Dumbbells, medicine balls, stability balls, kettlebells, TRX (love this single piece of equipment!), rowing machines, access to stairs for workouts or stair climber (stairs are another love for me), gliding discs, cable machine, foam rollers, and perhaps a few pieces of boxing equipment (I do rounds using gloves, wraps, and focus mitts).