It seems like years since I quit using clipless pedals and cleated shoes. In fact it has been over 5 years since I quit using them on my road bike.and nearly three years since I replaced them on my touring bike. It wasn't difficult at all the roadie pedals broke, I put platforms with regular toe clips on and realized I didn't miss anything but the pain of hotfoot. Linguistically it was an insult, after all, they do have clips, that's what holds the cleat. In fact having gone several years completely detached from my bike, I think clip less pedals are the single greatest deterrent to cycling.
Really, how often do people think of riding their bikes but change their mind because they don't want to dress for it? Now a pair of shorts or a golf shirt will work, but what about the shoes? I know all the sales people will tell you there is nothing to compare to them. Most riders claim a 20% increase in efficiency. They may be helpful in a race, there is data and tests to the contrary, but how many people race anyway? Is the questionable and negligible efficiency working for you when you drive to work? Or when you drive to the movies or dinner? I have found platforms with little spikes (actually set screws) work just as well for me.
I've had roadies worry that they look heavy, but even the MKS Grip King
only weigh an ounce more than the Wellgo clip less pedals I used to use.
With spiked pedals your feet don't slip, you lose little or no efficiency and
can just jump on the bike and ride with any pair of shoes you are wearing.