Wire nuts are good but quite labour-intensive and a bit annoying for fault finding and altering circuits. Wagos let you add or remove individual conductors in a matter of seconds and you can usually reterminate a wire without cutting back. Wire nuts aren't quite permanent like crimps but getting close. Apparently some older European wire nuts had a nasty habit of the plastic bit getting loose and falling off, leaving exposed live metal parts in junction boxes (remember reading that complaint from several Scandinavian electricians).
