I like the adjustable chain, it almost looks like a charm!
In terms of “to buy or not to buy”
“I don’t need it” - Need vs. don’t need..this is irrelevant. Of course you don’t “need”
“I know I would use this often” - this is the most important
“Love the bag” - secondary. (Take it from me..I love lots of things that are impractical) however since you will use it, that you love it, tips the balance. Plus it’s different

“Rather spend at H” - yes but is there a similar item for the use that you love? I know you have the Roulis...Would you use it same way?
Would you regret not buying it? Those bruises you get from kicking yourself kinda never heal..I don’t know why. There is no cure for regret (some Hakka saying)