The SVT 40's tend to stay in the safes for a reason. They have a reputation for breaking parts, to start with. Since they are in the seventy year old plus range, parts for repairs are not easy to acquire.
The SVT 40 is a good shooter. The rifle is long and a bit heavy, but it's elegant in it's way. The magazine isn't designed to be removed and replaced in action. Rather, it's reloaded with stripper clips. Most shooters today don't like stripper clips because they're used to just dropping the empty mag out of the weapon and popping another full magazine into a weapon. If you practise a bit with stripper clips you can get pretty proficient and it becomes second nature.
The SVT 40 uses the same stripper clips utilized by the Mosin Nagant rifle. They aren't hard to find or expensive.
The SVT 40 is relatively difficult to field strip for cleaning , so I only fire brass cased commercial ammo or my own reloads. Soft steel cases can cause extraction difficulties and all surplus ammo has to be regarded as corrosive. That bothers me not at all with a bolt gun , cleaning is relatively easy. But cleaning is not easy with the SVT 40.
I like these rifles for my purposes. I'm not going to be operating them in the forest, where their weight and length would factor in. I'm going to be cleaning them at the bench in my shop and not in the field. They can reach out and touch someone way out there, and the 7.62 x 54r is a full power battle round.