That's not the main thing that float does for you. Massive positive cash flow as a result of operational dynamics means that you if you happen to have explosive growth you can fund it out of your cash flow rather than having to go begging on Sand Hill to pay for your rocket fuel, like many tech companies.
Might as well give two examples of how it looks like with different business models:
+ SaaS is often cash-flow negative if you're doing month-to-month billing, since cost of customer acquisition (marketing spend + sales commission) is routinely 4~8 months of billings. If you increase MRR by $100k in a month you're doing great, unless you don't have $500k in the bank account, in which case you just bankrupted yourself.
+ E-commerce: If you're in a model where you actually hold inventory, it is very possible to need to pre-purchase a large amount of inventory in advance, occasionally on non-favorable credit terms (like e.g. cash before delivery), prior to being able to sell it. Many of the great e-commerce businesses are built on various hacks which flip this cash flow cycle around. Amazon, for example, was famous for (ab-)using traditionally prevailing payment terms in book publishing which are hilariously in the favor of retailers ("We'll just give you free inventory and only ask you for money if you sell it." "OK. Tell you what, how about we sell it, only then even take delivery, and then pay you." "My, you tech people sure don't understand how this game works. OK, sounds great.") -- that's one of the reasons they picked books as their first base of operations.