I am not a professional photographer, nor a professional amateur, but an ordinary photographer. Is it necessary to wear a full SLR recently?

Basically, it depends on your financial ability.

In principle, it is enough not to wear all clothes, and buy a better head.

The ratio of good to bad photos: lens > technology > body, and at the same time, it has to match the timing and environment.

Therefore, it is important to consider the machine head, the machine head has not changed much, and there is not much room for price reduction. With the progress of time and technology, the fuselage has been unable to catch up with generation after generation, and there is no need to catch up.