Solend has been battle-tested countless times since launch.
Solend survived the depegging of UST, the collapse of 3AC (plus contagion), the USDH oracle manipulation attack, the collapse of FTX, and the unbacking of soBTC. All while SOL fell from over $250 to $10.
These led to countless learnings which culminated in Solend V2, the most battle-tested lending protocol on Solana.