after 1 year here is my conclusion
I decided to test launchbox and arc browser
launchbox is limited to 100 roms in free version, if you want more i think it's 50$ for android version and 75$ for pc version. exaggerated prices I find not to reach the level of a free hyperspin.
Arc browser uses a database instead of xml and its scrapping engine is not 100% ready and you will have to manually do all the roms that it will not have succeeded in identifying.
Compared to the hyperspin wheel system which gives flexibility, here there is no flexibility, just the rigidity of a database.
In addition, the system themes are just mp4 files, a pale copy of the hyperspin themes, so customization is not possible yourself compared to hyperspin, which offers hypertheme with which you can modify any theme at will or create one from scratch with disconcerting ease.
I'm not even talking about themes for games that don't exist Compared to hyperspin there is a gap especially when you think of all the themes for arcade games.
I hadn't realized it until now but hyperspin is by far the best front end, it's free and in addition it allows to have a common hyperspin system for windows and android machines on a shared nas.
and for me downgrading shield tv is a bad idea, an outdated system cannot survive, it must be kept up to date. It's a very bad choice.
So my conclusion is that this hyperspin SAF support update is absolutely necessary, because for me it will be hyperspin or nothing.
@reznnate you are our only hope, please can you give us news on the progress on the SAF support
Happy new year to you and all hyperspin guys