This could not be further from the truth. The importance of volume 1 being on the shelf can not be understated. People who enjoy serial storytelling want a complete story from beginning to end (if there is an end). They don’t want to miss anything. They don’t want any confusion about what part comes next. They want 1, 2, 3, 4, 5, etc.
Imagine if Netflix only had only the few most recent episodes of a show up instead of every episode ever. Subscribers would drop like a rock.
You can only get significant new audience with number 1. Only a few chaotic evil type people will be happy to start in the middle somewhere. This means that number one always has to be available. Netflix always has episode 1 available. Manga always has every volume available. Underwear pervert comics only have the current issue available, and it’s rarely truly number one even if it has the number 1 printed on the cover.
My Hero Academia is one of the best selling manga in the US right now. It has about 30 volumes and has been going for years. Guess what volume is the third best selling manga volume on Amazon right now? That’s right, it’s volume 1. Volume 29 is in 4th place. Look at any best selling manga list, It’s usually about 60/40 split between the newest volumes of popular series and number 1 volumes.
Now if you bring a cross-over into play it may make sense that there is some excitement in terms of fan-service. “OMG, my favorite characters will interact with my other favorite characters.” It puts up big sales numbers because several separate audiences are all buying an additional book. But it doesn’t bring in much new audience. After its done, it may even lose audience who feels anxiety of not knowing wtf is going on if the cross-over in any way actually mattered. A dedicated person might catch up on everything, but most won’t. Readers will be lost.
To grow the audience you need to have a full story, from 1-X, available at all times, with no confusion and nothing missing whatsoever. That is the doorway through which a new person can come in. Anything else is effectively gatekeeping that can block even an interested person from getting started.
There’s actually a meme image that’s been going around on this exact topic, but I can’t find it right now. Anyone help me out?