Shifting with no clutch??

I learned to do it when I first started driving cause the car had a terrible clutch.

I now have a new car with a perfectly good clutch... but sometimes I just don't feel like clutchin it

I don't grind the gears, it shifts smooth.... and I just put it in N and brake when stopping.

Just wanted to know if anyone else is lazy like me and does this.

Why or why not?