Why should you be condemned to a machine? Hell why really settle for a stationary area to move in? For the most part, many people in fitness rely on or are dependent being in one stationary place like they've confined themselves in a cage. It's understandable being in one position to move and you can a million different things like push-ups, squats, weights and even running in place yet the greatest thing is to be able to move around as much of your environment as possible. Unless harsh weather is a factor, being outside brings new life to your movements. Be able to crawl, jump, swing, climb, swim, balance and sprint. Machines are your jail bars and you will be very limited.
The body was meant to adapt. Unless you're recovering from injuries or are a boobybuilder, isolating the body is a bad idea. Working on one part of the body multiple times overtaxes the joints and ligaments to a degree where the rest of the body has to keep up and when they don't it'll collapse on itself. We have abilities we have yet to realize. The body is the most programmed piece of operative machinery, it can adapt to particular moves, able to withstand quite a bit of punishment and have the ability to take on some amazing tasks. Never limit yourself, find a good of variety of things that will hit you from every angle as possible.
When most start out, they don't realize how fragile they are, sure they can push a little but it's also important to know that building a foundation is a starting point in the journey, not a fork in the road like most people believe. Also when you're starting out, do not ever push past your limits the first time around or go all hardcore, I know it's exciting and you're doing something new but don't make the mistake of pushing it beyond your starting points; otherwise you will get hurt and you could possibly be paying medical bills that you don't want. Let your body adapt to what it's doing and little by little, begin that ascend on the ladder of progression.
Never settle for a one-all-be all system, when you do that, you're isolating yourself from what could really reach your peak potential but it's also important to realize that doing a million things won't get the job done either. Keep things to a minimum as best as possible and if you want to do more things in a single session, mix and match your favorite programs. It isn't rocket science but it won't be easy either, besides in order to gain through progression you can't take the easy route.
When it comes down to it, we are movement, our bodies are our guide to the world and moving through space in various ways teaches us how to journey our spiritual and physical boundaries and where it can take us if we are willing to take steps into places most are too afraid to do. We push ourselves but most of the time in the very wrong way and we end up discouraged, hurt, tied down in our minds and we end up quitting when we are just going down that road. Be playful, develop a skill, challenge the norm and never settle for modern traditions or mainstream ideals; be different and become the greatest version of yourself.