What are the disadvantages of ETNs?

Sure, here's a description simulating the tone of a questioner regarding the disadvantages of ETNs (Exchange-Traded Notes): "Could you elaborate on the potential drawbacks of investing in ETNs? I've heard they offer exposure to various assets, but are there any specific risks or limitations that investors should be aware of? For instance, do ETNs come with higher fees compared to other investment options? And what about their credit risk - are ETNs exposed to the creditworthiness of the issuing bank, which could potentially affect the value of the investment? Additionally, are there any liquidity concerns with ETNs, especially during market downturns? Lastly, are there any other disadvantages that you believe are worth highlighting for investors considering ETNs as part of their portfolio?