Lighter in terms of memory? No way. Intellij is always at a few gb per instance. They are indeed laggy as hell. With the latest Mac os intellij products specifically bring down the entire os for ten to twenty minutes at a time requiring a hard reboot without which the cycle starts again. Except it's not java or intellij, it's the os. I only wish they were electron apps. That way I wouldn't have to return a $4400 brand new 16" mbpro because of its constant crashing due to horrible native apps. All apps can be shitty. At least electron ones are cross platform, work, and generally do not bring the whole system to a standstill followed by a hard crash. While using about the same resources as electron apps.