All roads in personal finances lead back to cash flow. If one has a well thought out budget that is based on solid rules of finance, then if a hobby purchase fits within their discretionary spending, they is no problem. Obviously interest rates affect this, but if the monthly payments are within the budget, then if you want to pay extra (interests) for enjoyment now, then fine.
Store financing comes with some traps. Often the credit line is the amount of the purchase. This limits (or close to limits) out the card and that can drag down your credit score (look up Credit Utilization Rate how this works with FICO). As a general rule, never carry a balance more than 30% of your credit line.
Also, before you ever take out a credit line, it's important that you totally understand the fees. These are usually buried in the fine print. For folks with less than good credit scores, the lines for which the qualify have buried fees that work out to 30% of the credit line whether or not you use the card. These are often split into both annual and monthly fees and they can also include automatic increased in the credit line with corresponding increase in fess.
Most people do not understand the nuances of credit and the banks rely on this to get their business. No doubt it's why americans carry nearly $1trillion in credit card debt while most have little to no savings.
When I was in banking, I used to quip "never finance a depreciating asset."