When I see threads like this about no motivation, should I jack it all in, sell up etc, I'm not sure what to write, as the flippant answer (always close to my lips/fingers

) is 'yes'.

I think we all go through periods of this though, as others have written above, I know I have. But I know that I will want to take some pictures once I have come through the 'funk', so there is no thought of selling up. Most of my gear is old and worth little anyway, so selling would be more of a hassle than a money making endeavour for me.

If I did sell up, and decided later that it was a mistake, I can't be sure I could afford to get back to the level of the gear I have now at a later date.
So, if I stop taking pics will anyone care other than me?

Not really, so stopping and starting whenever the urge takes me is no big thing. The big question is whether to go the whole hog and sell up, and only the individual can answer to themselves whether they are done forever. If you have had gear for many years, and depending on whether you need the income from selling gear to live on/for something else, then what harm does it do for the gear to stay in a cupboard until you get the urge, or finally are sure it is something that you will never want to do again.
You may also may have to ask yourself why you are taking pics at some point. There are many reasons for this, and we may all be slightly different. I personally enjoy the process of taking pictures. The technical stuff with the camera. The things I take pics of are subjects, scenes, moments, that I think will make a nice picture. I also enjoy editing the pictures, which can sometimes be simple, but sometimes more complicated, it depends on the images. I like to show my images to friends an family occasionally, but that is a minor thing, as whether I like my pics, as that is all that matters, and anyone else liking them is a bonus.
About 6-7 years ago I used to get really down if I ended up with pics that I wasn't happy with and think what was the point, until I thought about it for a bit. I enjoyed taking the pics at the time of capture. I enjoyed editing them to see what I could end up with. That what I had at the end wasn't very good didn't negate the the enjoyment I got from taking and editing them. For me, as long as I enjoyed some aspect of it, it was worth doing. It it isn't great pic at the end, it was a waste of time. I only have to please myself in some way.
There are strategies for trying to get the mojo back, and some have been mentioned above. Things like limiting what gear you use, (if you have a lot of gear

) maybe a camera with one lens, to help see scenes / subjects a different way may help. Setting yourself projects works for some. Taking pics of different subjects may help. I've seen people force themselves into pic a day challenges which they have found useful to get them out of their comfort zone and try new things. Now if you can't be othered doing anything....
It has to be said that a new piece of gear can sometimes be a kick to get up and out and about taking pics too. That can be an very expensive route to take, and with no guarantee of working, and so may add to the overall feeling of dissatisfaction.

It worked for me recently, but I had been waiting for this type of camera for 4-5 years.

It has got me out and about a lot recently, taking more sport pics than usual though, because of the nature of some of the features on the camera. It has been enjoyable to learn a new camera with so more advanced features than my previous camera as well. It can be an expensive route to take though, and not for the light pocketed / fainthearted.
Threads like this can sometimes show people that it is not just them, and it happens to others, but only the individual can decide whether it is time to walk away for good.