Where did you hear about loosing your work? Did you experience it? Did you report it? Kdenlive has a very robust project recovery system, even if it crashes you are able to recover your lost work. Also in any software you must continuously save.

It sounds like you have no crash or corruption problems in Premiere at all.

> having a real risk to lose my project after days and weeks of work is not something I am able to afford

Clearly you can, if you are currently using Premiere.

just download davinci resolve for free