The thing is you don't know if it's a couple of lines of code or a couple of weeks of coding. Other people have long standing feature requests that have never been implemented.
I'm happy to call Sylenth 1 finished but I'd hate to see Lennard's talent just vanish from the scene for whatever reason.
I'd much rather see something new from Lennard than just minor tweaks to S1 that really don't expand the range of sounds S1 can make.
If nobody has money for plugins these days it's not just going to affect Lennard. Development on other plugins hasn't stopped and in fact we've seen some new ones pop up during this period.
It seems like business goes on so I don't think the current situation is a valid reason to just give up. There may be personal reasons like a day job or family obligations etc but that's a whole different story.