there are two sides: there are the broadcasting standards themselves, which totally makes sense.
the other side is the tools for production. you can get close to the required standard by using ears and old school metering only, but you can also fuck it up using the latest super auto and whatnot plug-in.
That is why some times there was singles with Radio edit...actually that was before LUFS-metering
Seriously, broadcasting standards is good to know, but have to remember maximum loudness means maximum loudness, not good overall sound. FM-radiostations compress sound always (some more, some less), so this is reason why some 80's songs sound good these days and some ,modern too much loudness, songs sounds strange in radio.
Anyway..LUFS-metering is good to have to mastering to target levels of different streaming-services, because they normalize file level down, if your song maximum LUFS-level is more than target level of streaming-service. But, mastering to streaming services is different than to CD, DVD or vinyl, it is just one media more (actually it is many media, because some streaming servises use −14 LUFS and another use -18 LUFS)
It would be nice, if there is simple offline tool for Mac OS 9 to check whole song file that LUFS is under some number, something like that (picture is ebur128-command from ebumeter for Linux):
That kind of tool would be enough for LUFS metering, if you do as IIO said, use ears and old school metering. And make good sounding song, because it is easily under -14 LUFS, if don't compress the sound to sh*t. Remember target LUFS-level means it should be that or under, it doesn't mean it have to be that or even near of it.