Not sure about the dutch but IIRC switzerland and Germany hand out depot morphine pills (high dosed ones like 200mg) for those in opioid maintenance as well as methadone. They might do the same in the Netherlands. Hopefully someone with knowledge will chime in.
I'm actually quite happy with ,my buprenorphine but i also acknowledge that not everyone gets on with it quite as well. To me it's perfect. It's like being almost sober but the quite not completely. I can, even with my high tolerance, feel the opioidish effects (they're mild though) it provides and i'm quite happy to settle for that. That's enough for me for everyday use. I wouldn't want anything more effective/sedating. Plus buprenorphine greatly impacts my mood in a positive way. I'm a non responder to almost every possible antidepressant there are. Bupe does something positive to my brain that no antidepressant is capable of doing.
That being said bupe is lightweight solution for a heavy dope habit. If one has had a decade(s) of heavy opioid use (hell 3-4 years is more than enough) buprenorphine might just not cut it. Methadone usually does the job but the side-effects of heavy doses are horrendous. Men's testosterone levels drop below to prepubescent girls. The waterwaight and fat gain makes you look like a whale and you become very passive like you were on antipsychotics. And the sweating must be annoying AF. I believe morphine extend release tablets for opioid maintenance should be more widely used option. Methadone in high doses usually doesn't actually increase the quality of patient's life. For some it does but for too many it makes them bloat, gain weight and sweat constantly throughout the day. It also might make patient's congitive skills and functions lesser than before. I don't know too much about that but i would like to hear people's opinion on this one. Buprenorphine use has not declined my congitive skills and/or functions at all. I believe morphine doesn't do it to such an extent methadone does. Morphine is just a lot more humane treatment option compared to methadone. It's damn fucking shame it isn't more widely available.