Even @DarthCoin with his undoubted technical expertise claims using his custodial wallet on SNs is more trouble than its worth so maybe @DarthCoin will consider using Spark and finally be able to support the SN LN circular economy.
Then again you have to wonder if hes really just all talk and no walk.

Solomonsatoshi

I suppose the good reason is if you don't feel capable of running a lightning node. For instance, if you are using a custodial lightning wallet to interact with SN, it might make sense to switch to a spark-based wallet like Breez (at least some of Breez's products based on Spark, I believe) -- Spark, being a very large, well funded company, 

 be less likely to run off with your sats (also, they have a lot more to lose if they try any shenanigans).

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Scoresby

I suppose the good reason is if you don't feel capable of running a lightning node. For instance, if you are using a custodial lightning wallet to interact with SN, it might make sense to switch to a spark-based wallet like Breez (at least some of Breez's products based on Spark, I believe) -- Spark, being a very large, well funded company, *may* be less likely to run off with your sats (also, they have a lot more to lose if they try any shenanigans).